diff --git a/collects/frtime/animation.rkt b/collects/frtime/animation.rkt
index cb86ce0a43..e2667d9182 100644
--- a/collects/frtime/animation.rkt
+++ b/collects/frtime/animation.rkt
@@ -10,7 +10,7 @@
            frtime/frlibs/list
            frtime/frlibs/etc
            frtime/frlibs/math
-           (rename mzscheme mz:define-struct define-struct))
+           #;(rename mzscheme mz:define-struct define-struct))
   
   (require-for-syntax mzlib/etc)