diff --git a/racket/collects/racket/private/class-undef.rkt b/racket/collects/racket/private/class-undef.rkt
index 71f42aa044..e34c066d13 100644
--- a/racket/collects/racket/private/class-undef.rkt
+++ b/racket/collects/racket/private/class-undef.rkt
@@ -198,4 +198,4 @@
                          (syntax->datum expr)
                          (if s " at: " "")
                          (or s ""))
-                 #f)))
+                 expr)))