diff --git a/collects/framework/private/panel.rkt b/collects/framework/private/panel.rkt
index daf59fb4..5377b808 100644
--- a/collects/framework/private/panel.rkt
+++ b/collects/framework/private/panel.rkt
@@ -498,7 +498,7 @@
       (super-new [vertical? #t])))
   
   (define horizontal-dragable-mixin
-    (mixin (dragable<%>) (vertical-dragable<%>)
+    (mixin (dragable<%>) (horizontal-dragable<%>)
       (super-new [vertical? #f])))
   
   (define vertical-dragable% (vertical-dragable-mixin (dragable-mixin panel%)))