diff --git a/src/workerd/jsg/struct.h b/src/workerd/jsg/struct.h
index 31482bb470b..fc6c4a56191 100644
--- a/src/workerd/jsg/struct.h
+++ b/src/workerd/jsg/struct.h
@@ -103,8 +103,9 @@ class StructWrapper<Self, T, TypeTuple<FieldWrappers...>, kj::_::Indexes<indices
                      kj::isSameType<typename FieldWrappers::Type, Unimplemented>()) && ...)) {
         return T{};
       }
-      jsg::throwTypeError(isolate, "Cannot initialize a dictionary with required members from an "
-                                    "undefined or null value.");
+      jsg::throwTypeError(isolate, kj::str("Cannot initialize ", typeid(T).name(),
+                                           " with required members from an "
+                                           "undefined or null value."));
     }
 
     if (!handle->IsObject()) return kj::none;