1 files changed, 6 insertions, 1 deletions
diff --git a/src/passes/Print.cpp b/src/passes/Print.cpp
index d700f85f3..68a2d16dc 100644
--- a/src/passes/Print.cpp
+++ b/src/passes/Print.cpp
@@ -2116,7 +2116,12 @@ struct PrintExpressionContents
     if (curr->safety == RefCast::Unsafe) {
       printMedium(o, "ref.cast_nop ");
     } else {
-      printMedium(o, "ref.cast null ");
+      // Emulate legacy polymorphic behavior for now.
+      if (curr->ref->type.isNullable()) {
+        printMedium(o, "ref.cast null ");
+      } else {
+        printMedium(o, "ref.cast ");
+      }
     }
     printHeapType(o, curr->intendedType, wasm);
   }