diff --git a/collects/drracket/private/frame-icon.rkt b/collects/drracket/private/frame-icon.rkt
index 5fa7b1da17..cf9281228a 100644
--- a/collects/drracket/private/frame-icon.rkt
+++ b/collects/drracket/private/frame-icon.rkt
@@ -35,5 +35,6 @@
                   (send bdc set-bitmap #f)
                   bm)))
          
-         (send todays-icon set-loaded-mask todays-icon-bw-mask)
+         (when todays-icon-bw-mask
+           (send todays-icon set-loaded-mask todays-icon-bw-mask))
          todays-icon)))