diff --git a/src/V3Ast.h b/src/V3Ast.h
index e7dd18687..18c92b0b0 100644
--- a/src/V3Ast.h
+++ b/src/V3Ast.h
@@ -1954,7 +1954,7 @@ public:
     static constexpr int INSTR_COUNT_PLI = 20;  // PLI routines
 
     // ACCESSORS
-    virtual string name() const { return ""; }
+    virtual string name() const VL_MT_STABLE { return ""; }
     virtual string origName() const { return ""; }
     virtual void name(const string& name) {
         this->v3fatalSrc("name() called on object without name() method");
diff --git a/src/V3EmitCBase.h b/src/V3EmitCBase.h
index 7067f8ed6..f5b42b8b3 100644
--- a/src/V3EmitCBase.h
+++ b/src/V3EmitCBase.h
@@ -66,7 +66,7 @@ public:
     static string topClassName() VL_MT_SAFE {  // Return name of top wrapper module
         return v3Global.opt.prefix();
     }
-    static string prefixNameProtect(const AstNode* nodep) {  // C++ name with prefix
+    static string prefixNameProtect(const AstNode* nodep) VL_MT_STABLE {  // C++ name with prefix
         return v3Global.opt.modPrefix() + "_" + VIdProtect::protect(nodep->name());
     }
     static bool isAnonOk(const AstVar* varp) {
diff --git a/src/V3EmitCImp.cpp b/src/V3EmitCImp.cpp
index 8d8602957..964888a9c 100644
--- a/src/V3EmitCImp.cpp
+++ b/src/V3EmitCImp.cpp
@@ -577,6 +577,9 @@ class EmitCTrace final : EmitCFunc {
     V3UniqueNames m_uniqueNames;  // For generating unique file names
     std::unordered_map<AstNode*, int> m_enumNumMap;  // EnumDType to enumeration number
     std::deque<AstCFile*>& m_cfilesr;  // cfiles generated by this emit
+    V3OutCFile* m_typesFp = nullptr;  // File for type declarations
+    int m_traceTypeSubs = 0;  // Number of trace type declaration sub-functions
+    int m_typeSplitSize = 0;  // # of cfunc nodes placed into output file
 
     // METHODS
     void openNextOutputFile() {
@@ -610,6 +613,66 @@ class EmitCTrace final : EmitCFunc {
         puts("\n");
     }
 
+    V3OutCFile* typesFp() const VL_MT_SAFE { return m_typesFp; }
+
+    void openNextTypesFile() {
+        UASSERT(!m_typesFp, "Declarations output file already open");
+
+        string filename
+            = (v3Global.opt.makeDir() + "/" + topClassName() + "_" + protect("_TraceDecls"));
+        filename = m_uniqueNames.get(filename);
+        filename += "__Slow.cpp";
+
+        AstCFile* const cfilep = createCFile(filename, m_slow, true /*source*/);
+        cfilep->support(true);
+        m_cfilesr.push_back(cfilep);
+
+        if (optSystemC()) {
+            m_typesFp = new V3OutScFile{filename};
+        } else {
+            m_typesFp = new V3OutCFile{filename};
+        }
+        typesFp()->putsHeader();
+        typesFp()->puts("// DESCR"
+                        "IPTION: Verilator output: Tracing declarations\n");
+
+        // Includes
+        typesFp()->puts("#include \"" + v3Global.opt.traceSourceLang() + ".h\"\n");
+        typesFp()->puts("\n");
+
+        typesFp()->puts("\nvoid " + prefixNameProtect(m_modp) + "__"
+                        + protect("traceDeclTypesSub" + cvtToStr(m_traceTypeSubs++)) + "("
+                        + v3Global.opt.traceClassBase() + "* tracep) {\n");
+    }
+
+    void closeTypesFile() {
+        typesFp()->puts("}\n");
+        VL_DO_CLEAR(delete m_typesFp, m_typesFp = nullptr);
+    }
+
+    void callTypeSubs() {
+        typesFp()->puts("}\n");
+
+        // Forward declarations for subs in other files
+        for (int i = 0; i < m_traceTypeSubs - 1; ++i) {
+            typesFp()->puts("void " + prefixNameProtect(m_modp) + "__"
+                            + protect("traceDeclTypesSub" + cvtToStr(i)) + "("
+                            + v3Global.opt.traceClassBase() + "* tracep);\n");
+        }
+
+        typesFp()->puts("\nvoid " + prefixNameProtect(m_modp) + "__" + protect("trace_decl_types")
+                        + "(" + v3Global.opt.traceClassBase() + "* tracep) {\n");
+        for (int i = 0; i < m_traceTypeSubs; ++i) {
+            typesFp()->puts(prefixNameProtect(m_modp) + "__"
+                            + protect("traceDeclTypesSub" + cvtToStr(i)) + "(tracep);\n");
+        }
+    }
+
+    bool typesSplitNeeded() {
+        return v3Global.opt.outputSplitCTrace()
+               && m_typeSplitSize >= v3Global.opt.outputSplitCTrace();
+    }
+
     bool emitTraceIsScBv(AstTraceInc* nodep) {
         const AstVarRef* const varrefp = VN_CAST(nodep->declp()->valuep(), VarRef);
         if (!varrefp) return false;
@@ -697,43 +760,54 @@ class EmitCTrace final : EmitCFunc {
         puts(");");
     }
 
+    int getEnumMapNum(AstEnumDType* nodep) {
+        int enumNum = m_enumNumMap[nodep];
+        if (!enumNum) {
+            if (typesSplitNeeded()) {
+                // Splitting file, so using parallel build.
+                v3Global.useParallelBuild(true);
+                closeTypesFile();
+                openNextTypesFile();
+            }
+            enumNum = ++m_enumNum;
+            m_enumNumMap[nodep] = enumNum;
+            int nvals = 0;
+            typesFp()->puts("{\n");
+            typesFp()->puts("const char* " + protect("__VenumItemNames") + "[]\n");
+            typesFp()->puts("= {");
+            for (AstEnumItem* itemp = nodep->itemsp(); itemp;
+                 itemp = VN_AS(itemp->nextp(), EnumItem)) {
+                if (++nvals > 1) typesFp()->puts(", ");
+                typesFp()->putbs("\"" + itemp->prettyName() + "\"");
+            }
+            typesFp()->puts("};\n");
+            nvals = 0;
+            typesFp()->puts("const char* " + protect("__VenumItemValues") + "[]\n");
+            typesFp()->puts("= {");
+            for (AstEnumItem* itemp = nodep->itemsp(); itemp;
+                 itemp = VN_AS(itemp->nextp(), EnumItem)) {
+                AstConst* const constp = VN_AS(itemp->valuep(), Const);
+                if (++nvals > 1) typesFp()->puts(", ");
+                typesFp()->putbs("\"" + constp->num().displayed(nodep, "%0b") + "\"");
+            }
+            typesFp()->puts("};\n");
+            typesFp()->puts("tracep->declDTypeEnum(" + cvtToStr(enumNum) + ", \""
+                            + nodep->prettyName() + "\", " + cvtToStr(nvals) + ", "
+                            + cvtToStr(nodep->widthMin()) + ", " + protect("__VenumItemNames")
+                            + ", " + protect("__VenumItemValues") + ");\n");
+            typesFp()->puts("}\n");
+            m_typeSplitSize += 3;
+        }
+        return enumNum;
+    }
+
     int emitTraceDeclDType(AstNodeDType* nodep) {
         // Return enum number or -1 for none
         if (v3Global.opt.traceFormat().fst()) {
             // Skip over refs-to-refs, but stop before final ref so can get data type name
             // Alternatively back in V3Width we could push enum names from upper typedefs
             if (AstEnumDType* const enump = VN_CAST(nodep->skipRefToEnump(), EnumDType)) {
-                int enumNum = m_enumNumMap[enump];
-                if (!enumNum) {
-                    enumNum = ++m_enumNum;
-                    m_enumNumMap[enump] = enumNum;
-                    int nvals = 0;
-                    puts("{\n");
-                    puts("const char* " + protect("__VenumItemNames") + "[]\n");
-                    puts("= {");
-                    for (AstEnumItem* itemp = enump->itemsp(); itemp;
-                         itemp = VN_AS(itemp->nextp(), EnumItem)) {
-                        if (++nvals > 1) puts(", ");
-                        putbs("\"" + itemp->prettyName() + "\"");
-                    }
-                    puts("};\n");
-                    nvals = 0;
-                    puts("const char* " + protect("__VenumItemValues") + "[]\n");
-                    puts("= {");
-                    for (AstEnumItem* itemp = enump->itemsp(); itemp;
-                         itemp = VN_AS(itemp->nextp(), EnumItem)) {
-                        AstConst* const constp = VN_AS(itemp->valuep(), Const);
-                        if (++nvals > 1) puts(", ");
-                        putbs("\"" + constp->num().displayed(nodep, "%0b") + "\"");
-                    }
-                    puts("};\n");
-                    puts("tracep->declDTypeEnum(" + cvtToStr(enumNum) + ", \""
-                         + enump->prettyName() + "\", " + cvtToStr(nvals) + ", "
-                         + cvtToStr(enump->widthMin()) + ", " + protect("__VenumItemNames") + ", "
-                         + protect("__VenumItemValues") + ");\n");
-                    puts("}\n");
-                }
-                return enumNum;
+                return getEnumMapNum(enump);
             }
         }
         return -1;
@@ -869,12 +943,17 @@ class EmitCTrace final : EmitCFunc {
         m_modp = modp;
         // Open output file
         openNextOutputFile();
+        if (m_slow) openNextTypesFile();
         // Emit functions
         for (AstNode* nodep = modp->stmtsp(); nodep; nodep = nodep->nextp()) {
             if (AstCFunc* const funcp = VN_CAST(nodep, CFunc)) { iterateConst(funcp); }
         }
         // Close output file
         VL_DO_CLEAR(delete m_ofp, m_ofp = nullptr);
+        if (m_slow) {
+            callTypeSubs();
+            closeTypesFile();
+        }
     }
     ~EmitCTrace() override = default;
 
diff --git a/src/V3EmitCModel.cpp b/src/V3EmitCModel.cpp
index 326aa21a9..beadfabc0 100644
--- a/src/V3EmitCModel.cpp
+++ b/src/V3EmitCModel.cpp
@@ -498,6 +498,8 @@ class EmitCModel final : public EmitCFunc {
         putSectionDelimiter("Trace configuration");
 
         // Forward declaration
+        puts("\nvoid " + topModNameProtected + "__" + protect("trace_decl_types") + "("
+             + v3Global.opt.traceClassBase() + "* tracep);\n");
         puts("\nvoid " + topModNameProtected + "__" + protect("trace_init_top") + "("
              + topModNameProtected + "* vlSelf, " + v3Global.opt.traceClassBase()
              + "* tracep);\n");
@@ -516,6 +518,7 @@ class EmitCModel final : public EmitCFunc {
         puts("vlSymsp->__Vm_baseCode = code;\n");
         puts("tracep->pushPrefix(std::string{vlSymsp->name()}, "
              "VerilatedTracePrefixType::SCOPE_MODULE);\n");
+        puts(topModNameProtected + "__" + protect("trace_decl_types") + "(tracep);\n");
         puts(topModNameProtected + "__" + protect("trace_init_top") + "(vlSelf, tracep);\n");
         puts("tracep->popPrefix();\n");
         puts("}\n");
diff --git a/src/V3Options.h b/src/V3Options.h
index 77b5e5e8d..7a4a8cd97 100644
--- a/src/V3Options.h
+++ b/src/V3Options.h
@@ -143,7 +143,7 @@ public:
     constexpr operator en() const { return m_e; }
     bool fst() const { return m_e == FST; }
     bool vcd() const { return m_e == VCD; }
-    string classBase() const {
+    string classBase() const VL_MT_SAFE {
         static const char* const names[] = {"VerilatedVcd", "VerilatedFst"};
         return names[m_e];
     }
@@ -643,7 +643,7 @@ public:
     bool fTable() const { return m_fTable; }
     bool fTaskifyAll() const { return m_fTaskifyAll; }
 
-    string traceClassBase() const { return m_traceFormat.classBase(); }
+    string traceClassBase() const VL_MT_SAFE { return m_traceFormat.classBase(); }
     string traceClassLang() const { return m_traceFormat.classBase() + (systemC() ? "Sc" : "C"); }
     string traceSourceBase() const { return m_traceFormat.sourceName(); }
     string traceSourceLang() const VL_MT_SAFE {
diff --git a/test_regress/driver.pl b/test_regress/driver.pl
index 4685a066d..c26d0b112 100755
--- a/test_regress/driver.pl
+++ b/test_regress/driver.pl
@@ -2492,6 +2492,20 @@ sub file_grep {
     }
 }
 
+sub file_grep_count {
+    my $self = (ref $_[0] ? shift : $Self);
+    my $filename = shift;
+    my $regexp = shift;
+    my $expcount = shift;
+    return if $self->errors || $self->skips;
+
+    my $contents = $self->file_contents($filename);
+    my $count = () = $contents =~ /$regexp/g;
+    if ($count != $expcount) {
+        $self->error("file_grep_count: $filename: Got='$count' Expected='$expcount' for regexp: $regexp\n");
+    }
+}
+
 sub file_grep_any {
     my $self = $Self;
     my @filenames = @{$_[0]}; shift;
diff --git a/test_regress/t/t_trace_complex_fst.out b/test_regress/t/t_trace_complex_fst.out
index 39236fad4..d4ca2fffa 100644
--- a/test_regress/t/t_trace_complex_fst.out
+++ b/test_regress/t/t_trace_complex_fst.out
@@ -1,5 +1,5 @@
 $date
-	Tue Oct 24 11:00:03 2023
+	Thu Dec 14 09:06:44 2023
 
 $end
 $version
@@ -9,6 +9,8 @@ $timescale
 	1ps
 $end
 $scope module top $end
+$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
+$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $scope module $unit $end
 $var bit 1 ! global_bit $end
 $upscope $end
@@ -36,12 +38,10 @@ $var real 64 4 v_real $end
 $var real 64 5 v_arr_real[0] $end
 $var real 64 6 v_arr_real[1] $end
 $var logic 64 7 v_str32x2 [63:0] $end
-$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 8 v_enumed [31:0] $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 9 v_enumed2 [31:0] $end
-$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $attrbegin misc 07 "" 2 $end
 $var logic 3 : v_enumb [2:0] $end
 $var logic 6 ; v_enumb2_str [5:0] $end
@@ -67,8 +67,8 @@ $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
-#0
 $dumpvars
+#0
 b00000000000000000000000000000000 D
 b00000000000000000000000000000000 C
 b00000000000000000000000000000011 B
@@ -105,7 +105,6 @@ b00 $
 b00000000000000000000000000000000 #
 0"
 1!
-$end
 #10
 1"
 b00000000000000000000000000000001 #
diff --git a/test_regress/t/t_trace_complex_fst_sc.out b/test_regress/t/t_trace_complex_fst_sc.out
index ceef7646a..9cb3b3fdd 100644
--- a/test_regress/t/t_trace_complex_fst_sc.out
+++ b/test_regress/t/t_trace_complex_fst_sc.out
@@ -1,5 +1,5 @@
 $date
-	Tue Oct 24 11:09:24 2023
+	Thu Dec 14 10:34:23 2023
 
 $end
 $version
@@ -9,6 +9,8 @@ $timescale
 	1ps
 $end
 $scope module top $end
+$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
+$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $scope module $unit $end
 $var bit 1 ! global_bit $end
 $upscope $end
@@ -35,12 +37,10 @@ $var real 64 4 v_real $end
 $var real 64 5 v_arr_real[0] $end
 $var real 64 6 v_arr_real[1] $end
 $var logic 64 7 v_str32x2 [63:0] $end
-$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 8 v_enumed [31:0] $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 9 v_enumed2 [31:0] $end
-$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $attrbegin misc 07 "" 2 $end
 $var logic 3 : v_enumb [2:0] $end
 $var logic 6 ; v_enumb2_str [5:0] $end
@@ -66,8 +66,8 @@ $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
-#0
 $dumpvars
+#0
 b00000000000000000000000000000000 D
 b00000000000000000000000000000000 C
 b00000000000000000000000000000011 B
@@ -104,7 +104,6 @@ b00 $
 b00000000000000000000000000000000 #
 0"
 1!
-$end
 #10
 1"
 b00000000000000000000000000000001 #
diff --git a/test_regress/t/t_trace_complex_params_fst.out b/test_regress/t/t_trace_complex_params_fst.out
index 803d49c16..b212749f5 100644
--- a/test_regress/t/t_trace_complex_params_fst.out
+++ b/test_regress/t/t_trace_complex_params_fst.out
@@ -1,5 +1,5 @@
 $date
-	Tue Oct 24 11:02:57 2023
+	Thu Dec 14 09:16:48 2023
 
 $end
 $version
@@ -9,6 +9,8 @@ $timescale
 	1ps
 $end
 $scope module top $end
+$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
+$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $scope module $unit $end
 $var bit 1 ! global_bit $end
 $upscope $end
@@ -36,12 +38,10 @@ $var real 64 4 v_real $end
 $var real 64 5 v_arr_real[0] $end
 $var real 64 6 v_arr_real[1] $end
 $var logic 64 7 v_str32x2 [63:0] $end
-$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 8 v_enumed [31:0] $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 9 v_enumed2 [31:0] $end
-$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $attrbegin misc 07 "" 2 $end
 $var logic 3 : v_enumb [2:0] $end
 $var logic 6 ; v_enumb2_str [5:0] $end
@@ -67,8 +67,8 @@ $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
-#0
 $dumpvars
+#0
 b00000000000000000000000000000000 D
 b00000000000000000000000000000000 C
 b00000000000000000000000000000011 B
@@ -105,7 +105,6 @@ b00 $
 b00000000000000000000000000000000 #
 0"
 1!
-$end
 #10
 1"
 b00000000000000000000000000000001 #
diff --git a/test_regress/t/t_trace_complex_params_fst_sc.out b/test_regress/t/t_trace_complex_params_fst_sc.out
index 46e0911c9..f05ce81a0 100644
--- a/test_regress/t/t_trace_complex_params_fst_sc.out
+++ b/test_regress/t/t_trace_complex_params_fst_sc.out
@@ -1,5 +1,5 @@
 $date
-	Tue Oct 24 11:09:58 2023
+	Thu Dec 14 10:35:10 2023
 
 $end
 $version
@@ -9,6 +9,8 @@ $timescale
 	1ps
 $end
 $scope module top $end
+$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
+$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $scope module $unit $end
 $var bit 1 ! global_bit $end
 $upscope $end
@@ -35,12 +37,10 @@ $var real 64 4 v_real $end
 $var real 64 5 v_arr_real[0] $end
 $var real 64 6 v_arr_real[1] $end
 $var logic 64 7 v_str32x2 [63:0] $end
-$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 8 v_enumed [31:0] $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 9 v_enumed2 [31:0] $end
-$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $attrbegin misc 07 "" 2 $end
 $var logic 3 : v_enumb [2:0] $end
 $var logic 6 ; v_enumb2_str [5:0] $end
@@ -66,8 +66,8 @@ $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
-#0
 $dumpvars
+#0
 b00000000000000000000000000000000 D
 b00000000000000000000000000000000 C
 b00000000000000000000000000000011 B
@@ -104,7 +104,6 @@ b00 $
 b00000000000000000000000000000000 #
 0"
 1!
-$end
 #10
 1"
 b00000000000000000000000000000001 #
diff --git a/test_regress/t/t_trace_complex_structs_fst.out b/test_regress/t/t_trace_complex_structs_fst.out
index 81ae0ea36..e3ded82e6 100644
--- a/test_regress/t/t_trace_complex_structs_fst.out
+++ b/test_regress/t/t_trace_complex_structs_fst.out
@@ -1,5 +1,5 @@
 $date
-	Tue Oct 24 11:01:27 2023
+	Thu Dec 14 09:17:16 2023
 
 $end
 $version
@@ -9,6 +9,8 @@ $timescale
 	1ps
 $end
 $scope module top $end
+$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
+$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $scope module $unit $end
 $var bit 1 ! global_bit $end
 $upscope $end
@@ -76,12 +78,10 @@ $upscope $end
 $scope struct v_str32x2[1] $end
 $var logic 32 C data [31:0] $end
 $upscope $end
-$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 D v_enumed [31:0] $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 E v_enumed2 [31:0] $end
-$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $attrbegin misc 07 "" 2 $end
 $var logic 3 F v_enumb [2:0] $end
 $scope struct v_enumb2_str $end
@@ -103,8 +103,8 @@ $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
-#0
 $dumpvars
+#0
 b00000000000000000000000000000000 N
 b00000000000000000000000000000000 M
 0L
@@ -151,7 +151,6 @@ b00 ,
 b00000000000000000000000000000000 #
 0"
 1!
-$end
 #10
 1"
 b00000000000000000000000000000001 #
diff --git a/test_regress/t/t_trace_complex_structs_fst_sc.out b/test_regress/t/t_trace_complex_structs_fst_sc.out
index 8bfcf9b29..05920c5f0 100644
--- a/test_regress/t/t_trace_complex_structs_fst_sc.out
+++ b/test_regress/t/t_trace_complex_structs_fst_sc.out
@@ -1,5 +1,5 @@
 $date
-	Tue Oct 24 11:01:32 2023
+	Thu Dec 14 10:35:37 2023
 
 $end
 $version
@@ -9,6 +9,8 @@ $timescale
 	1ps
 $end
 $scope module top $end
+$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
+$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $scope module $unit $end
 $var bit 1 ! global_bit $end
 $upscope $end
@@ -75,12 +77,10 @@ $upscope $end
 $scope struct v_str32x2[1] $end
 $var logic 32 C data [31:0] $end
 $upscope $end
-$attrbegin misc 07 t.enumed_t 4 ZERO ONE TWO THREE 00000000000000000000000000000000 00000000000000000000000000000001 00000000000000000000000000000010 00000000000000000000000000000011 1 $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 D v_enumed [31:0] $end
 $attrbegin misc 07 "" 1 $end
 $var int 32 E v_enumed2 [31:0] $end
-$attrbegin misc 07 t.enumb_t 4 BZERO BONE BTWO BTHREE 000 001 010 011 2 $end
 $attrbegin misc 07 "" 2 $end
 $var logic 3 F v_enumb [2:0] $end
 $scope struct v_enumb2_str $end
@@ -102,8 +102,8 @@ $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
-#0
 $dumpvars
+#0
 b00000000000000000000000000000000 N
 b00000000000000000000000000000000 M
 0L
@@ -150,7 +150,6 @@ b00 ,
 b00000000000000000000000000000000 #
 0"
 1!
-$end
 #10
 1"
 b00000000000000000000000000000001 #
diff --git a/test_regress/t/t_trace_enum.v b/test_regress/t/t_trace_enum.v
new file mode 100644
index 000000000..2e4e7005a
--- /dev/null
+++ b/test_regress/t/t_trace_enum.v
@@ -0,0 +1,27 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2009 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
+
+typedef enum logic [1:0] {VAL_A, VAL_B, VAL_C, VAL_D} state_t;
+
+interface MyIntf;
+   state_t state;
+endinterface
+
+
+module t (clk);
+   input clk;
+
+   MyIntf #() sink ();
+   state_t v_enumed;
+
+   typedef enum logic [1:0] {VAL_X, VAL_Y, VAL_Z} other_state_t;
+   other_state_t v_other_enumed;
+
+   always @ (posedge clk) begin
+      $write("*-* All Finished *-*\n");
+      $finish;
+   end
+endmodule
diff --git a/test_regress/t/t_trace_enum_fst.out b/test_regress/t/t_trace_enum_fst.out
new file mode 100644
index 000000000..c13e7b815
--- /dev/null
+++ b/test_regress/t/t_trace_enum_fst.out
@@ -0,0 +1,35 @@
+$date
+	Tue Dec 19 07:15:22 2023
+
+$end
+$version
+	fstWriter
+$end
+$timescale
+	1ps
+$end
+$scope module top $end
+$attrbegin misc 07 $unit::state_t 4 VAL_A VAL_B VAL_C VAL_D 00 01 10 11 1 $end
+$attrbegin misc 07 t.other_state_t 3 VAL_X VAL_Y VAL_Z 00 01 10 2 $end
+$var wire 1 ! clk $end
+$scope module t $end
+$var wire 1 ! clk $end
+$scope interface sink $end
+$attrbegin misc 07 "" 1 $end
+$var logic 2 " state [1:0] $end
+$upscope $end
+$attrbegin misc 07 "" 1 $end
+$var logic 2 # v_enumed [1:0] $end
+$attrbegin misc 07 "" 2 $end
+$var logic 2 $ v_other_enumed [1:0] $end
+$upscope $end
+$upscope $end
+$enddefinitions $end
+$dumpvars
+#0
+b00 $
+b00 #
+b00 "
+0!
+#10
+1!
diff --git a/test_regress/t/t_trace_enum_fst.pl b/test_regress/t/t_trace_enum_fst.pl
new file mode 100755
index 000000000..d59b6459d
--- /dev/null
+++ b/test_regress/t/t_trace_enum_fst.pl
@@ -0,0 +1,34 @@
+#!/usr/bin/env perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2003-2009 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+scenarios(simulator => 1);
+
+top_filename("t/t_trace_enum.v");
+
+compile(
+    verilator_flags2 => ['--cc --trace-fst --output-split-ctrace 1'],
+    );
+
+execute(
+    check_finished => 1,
+    );
+
+fst_identical($Self->trace_filename, $Self->{golden_filename});
+
+# Five $attrbegin expected:
+# - state_t declaration
+# - t.v_enumed
+# - t.sink.state
+# - other_state_t declaration
+# - t.v_other_enumed
+file_grep_count($Self->{golden_filename}, qr/attrbegin/, 5);
+
+ok(1);
+1;