diff --git a/collects/racket/private/class-internal.rkt b/collects/racket/private/class-internal.rkt
index 090f0cb0a8..9cd3b76cb7 100644
--- a/collects/racket/private/class-internal.rkt
+++ b/collects/racket/private/class-internal.rkt
@@ -3861,6 +3861,7 @@ An example
                                method-ht
                                (class-method-ids cls)
                                null
+                               null
 
                                (make-weak-hasheq)