diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index aa1de5970..a420d2a04 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -1979,7 +1979,7 @@ private:
     }
     void visit(AstCastWrap* nodep) override {
         // Inserted by V3Width only so we know has been resolved
-        UASSERT_OBJ(nodep->didWidth(), nodep, "CastWrap should have width'ed earlier");
+        userIterateAndNext(nodep->lhsp(), WidthVP{nodep->dtypep(), BOTH}.p());
     }
     void castSized(AstNode* nodep, AstNode* underp, int width) {
         const AstBasicDType* underDtp = VN_CAST(underp->dtypep(), BasicDType);
diff --git a/test_regress/t/t_cast_param_type.pl b/test_regress/t/t_cast_param_type.pl
index 09b2ce4eb..b46d46042 100755
--- a/test_regress/t/t_cast_param_type.pl
+++ b/test_regress/t/t_cast_param_type.pl
@@ -8,9 +8,13 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
-scenarios(linter => 1);
+scenarios(simulator => 1);
 
-lint(
+compile(
+    );
+
+execute(
+    check_finished => 1,
     );
 
 ok(1);
diff --git a/test_regress/t/t_cast_param_type.v b/test_regress/t/t_cast_param_type.v
index 81b24c854..18a50fe0d 100644
--- a/test_regress/t/t_cast_param_type.v
+++ b/test_regress/t/t_cast_param_type.v
@@ -16,8 +16,21 @@ module SubB
    ();
 endmodule
 
+function automatic letters_t lfunc(int a);
+    return letters_t'(1);
+endfunction
+
 module t ();
+   localparam FMT = lfunc(1);
+
    SubA suba0 ();
    SubA #(.LETTER(letters_t'(1))) suba1 ();
    SubB #(.LETTER(letters_t'(1))) subb2 ();
+
+   initial begin
+      if (lfunc(1) != B) $stop;
+      if (FMT != B) $stop;
+      $write("*-* All Finished *-*\n");
+      $finish;
+   end
 endmodule