diff --git a/src/V3Active.cpp b/src/V3Active.cpp
index 06a1d7f51..0350609cc 100644
--- a/src/V3Active.cpp
+++ b/src/V3Active.cpp
@@ -571,10 +571,11 @@ private:
         if (nodep->access().isWriteOnly()) {
             vscp->user2(true);
         } else {
-            // If the variable is read before it is written, and is not in the sensitivity list,
-            // then this cannot be optimized into a combinational process
+            // If the variable is read before it is written (and is not a never-changing value),
+            // and is not in the sensitivity list, then this cannot be optimized into a
+            // combinational process
             // TODO: live variable analysis would be more precise
-            if (!vscp->user2() && !vscp->user1()) m_canBeComb = false;
+            if (!vscp->user2() && !vscp->varp()->valuep() && !vscp->user1()) m_canBeComb = false;
         }
     }
     void visit(AstAssignDly* nodep) override {
diff --git a/test_regress/t/t_case_huge.pl b/test_regress/t/t_case_huge.pl
index 79a6a7976..c8266ccbc 100755
--- a/test_regress/t/t_case_huge.pl
+++ b/test_regress/t/t_case_huge.pl
@@ -14,9 +14,12 @@ compile(
     verilator_flags2 => ["--stats"],
     );
 
-if ($Self->{vlt_all}) {
+if ($Self->{vlt}) {
     file_grep($Self->{stats}, qr/Optimizations, Tables created\s+(\d+)/i, 10);
-    file_grep($Self->{stats}, qr/Optimizations, Combined CFuncs\s+(\d+)/i, 0);
+    file_grep($Self->{stats}, qr/Optimizations, Combined CFuncs\s+(\d+)/i, 8);
+} elsif ($Self->{vltmt}) {
+    file_grep($Self->{stats}, qr/Optimizations, Tables created\s+(\d+)/i, 10);
+    file_grep($Self->{stats}, qr/Optimizations, Combined CFuncs\s+(\d+)/i, 9);
 }
 
 execute(