diff --git a/collects/mred/private/kernel.ss b/collects/mred/private/kernel.ss
index 83ceeaed..bff9e414 100644
--- a/collects/mred/private/kernel.ss
+++ b/collects/mred/private/kernel.ss
@@ -1394,6 +1394,13 @@
     on-size
     on-set-focus
     on-kill-focus)
+  (define-class group-box% item% #f
+    on-drop-file
+    pre-on-event
+    pre-on-char
+    on-size
+    on-set-focus
+    on-kill-focus)
 
   ;; Functions defined in wxscheme.cxx
   (define-functions