diff --git a/xpfe/browser/src/navigator.xul b/xpfe/browser/src/navigator.xul
index 9050d12d523..3b67d200476 100644
--- a/xpfe/browser/src/navigator.xul
+++ b/xpfe/browser/src/navigator.xul
@@ -330,7 +330,7 @@
       }
     }
     if (toolkitCore) {
-      toolkitCore.ShowWindow("resource:/res/mailnews/messenger/mailshell.xul",
+      toolkitCore.ShowWindow("chrome://messenger/content/",
                              window);
     }
   }