diff --git a/collects/typed-scheme/private/base-structs.rkt b/collects/typed-scheme/private/base-structs.rkt
index 03bcb0f3..2fe17fe9 100644
--- a/collects/typed-scheme/private/base-structs.rkt
+++ b/collects/typed-scheme/private/base-structs.rkt
@@ -96,4 +96,4 @@
       (define-hierarchy exn:fail:user ())))
 
   ;; cce: adding exn:break would require a generic type for continuations
-  )
\ No newline at end of file
+  (void))