diff --git a/mozilla/mailnews/base/resources/content/messenger.xul b/mozilla/mailnews/base/resources/content/messenger.xul
index 04e92261fa8..b9b33c0381c 100644
--- a/mozilla/mailnews/base/resources/content/messenger.xul
+++ b/mozilla/mailnews/base/resources/content/messenger.xul
@@ -34,7 +34,7 @@ Rights Reserved.
         xmlns:html="http://www.w3.org/TR/REC-html40"
 		title="&messengerWindow.title;"
         titlemodifier="&titleModifier.label;"
-        titlemodifierseperator="&titleSeperator.label;"
+        titlemenuseparator="&titleSeperator.label;"
 		onload="OnLoadMessenger()"
 		onunload="OnUnloadMessenger()"
 		align="vertical"