diff --git a/collects/mzlib/unit.rkt b/collects/mzlib/unit.rkt
index e5efa5b..6079b0f 100644
--- a/collects/mzlib/unit.rkt
+++ b/collects/mzlib/unit.rkt
@@ -2,7 +2,7 @@
 
 ;; deprecated library, see `racket/unit`
 
-(require racket/unit
+(require (except-in racket/unit struct/ctc)
          (submod racket/unit compat))
-(provide (except-out (all-from-out racket/unit) struct/ctc)
+(provide (all-from-out racket/unit)
          (all-from-out (submod racket/unit compat)))