diff --git a/Changes b/Changes
index 07c6c9b30..bf67ba73d 100644
--- a/Changes
+++ b/Changes
@@ -19,6 +19,7 @@ Verilator 4.219 devel
 * Add trace dumpvars() call for selective runtime tracing (#3322). [Shunyao CAD]
 * Fix skipping public enum values with four-state values (#3303).
 * Fix $readmem file not found to be warning not error (#3310). [Alexander Grobman]
+* Fix class stringification on wide arrays (#3312). [Iru Cai]
 * Fix public function arguments that are arrayed (#3316). [pawel256]
 * Fix compile error with --trace-fst --sc (#3332). [leavinel]
 * Fix crash in recursive module inlining (#3324). [Larry Doolittle]
diff --git a/src/V3Common.cpp b/src/V3Common.cpp
index 29e1bebd4..7915126a4 100644
--- a/src/V3Common.cpp
+++ b/src/V3Common.cpp
@@ -71,7 +71,7 @@ static void makeToStringMiddle(AstClass* nodep) {
                 comma = ", ";
                 stmt += itemp->origNameProtect();
                 stmt += ":\" + ";
-                if (itemp->isWide()) {
+                if (VN_IS(itemp->dtypep()->skipRefp(), BasicDType) && itemp->isWide()) {
                     stmt += "VL_TO_STRING_W(";
                     stmt += cvtToStr(itemp->widthWords());
                     stmt += ", ";
diff --git a/test_regress/t/t_class_format.out b/test_regress/t/t_class_format.out
index e4886448b..dd9e17d2a 100644
--- a/test_regress/t/t_class_format.out
+++ b/test_regress/t/t_class_format.out
@@ -1,4 +1,4 @@
-''{b:'h1, i:'h2a, carray4:'{'h11, 'h22, 'h33, 'h44} , name:"object_name"}'
-''{b:'h1, i:'h2a, carray4:'{'h911, 'h922, 'h933, 'h944} , name:"object_name"}'
+''{b:'h1, i:'h2a, carray4:'{'h11, 'h22, 'h33, 'h44} , cwide:'{'h0, 'h0} , name:"object_name"}'
+''{b:'h1, i:'h2a, carray4:'{'h911, 'h922, 'h933, 'h944} , cwide:'{'h0, 'h0} , name:"object_name"}'
 DEBUG: object_name (@0) message
 *-* All Finished *-*
diff --git a/test_regress/t/t_class_format.v b/test_regress/t/t_class_format.v
index 15a67bca9..ac11b68c0 100644
--- a/test_regress/t/t_class_format.v
+++ b/test_regress/t/t_class_format.v
@@ -15,6 +15,7 @@ class Cls;
    bit b;
    int i;
    bit [15:0] carray4 [4];
+   bit [64:0] cwide[2];
    string     name;
    task debug();
       $display("DEBUG: %s (@%0t) %s", this.name, $realtime, "message");