1 files changed, 4 insertions, 0 deletions
diff --git a/src/wasm-builder.h b/src/wasm-builder.h
index cbdd7abf7..8b34d6933 100644
--- a/src/wasm-builder.h
+++ b/src/wasm-builder.h
@@ -1155,6 +1155,10 @@ public:
       }
       return makeStringConst(string);
     }
+    if (type.isRef() && type.getHeapType() == HeapType::ext) {
+      return makeRefAs(ExternExternalize,
+                       makeConstantExpression(value.internalize()));
+    }
     TODO_SINGLE_COMPOUND(type);
     WASM_UNREACHABLE("unsupported constant expression");
   }