diff --git a/toolkit/profile/content/profileSelection.js b/toolkit/profile/content/profileSelection.js
index 65a2ba13fb..05ef6f5edb 100644
--- a/toolkit/profile/content/profileSelection.js
+++ b/toolkit/profile/content/profileSelection.js
@@ -133,8 +133,8 @@ function onProfilesKey(aEvent)
 {
   switch ( aEvent.keyCode )
   {
-#ifndef XP_MACOSX
   case KeyEvent.DOM_VK_BACK_SPACE:
+#ifndef XP_MACOSX
     break;
 #endif
   case KeyEvent.DOM_VK_DELETE: