diff --git a/mailnews/base/resources/content/messageWindow.xul b/mailnews/base/resources/content/messageWindow.xul
index 7fde3c6bb1da..fdd9c7f8fa95 100644
--- a/mailnews/base/resources/content/messageWindow.xul
+++ b/mailnews/base/resources/content/messageWindow.xul
@@ -26,6 +26,7 @@ Rights Reserved.
 <?xul-overlay href="chrome://messenger/content/platformMailnewsOverlay.xul"?>
 <?xul-overlay href="chrome://messenger/content/msgHdrViewOverlay.xul"?>
 <?xul-overlay href="chrome://messenger/content/mailWindowOverlay.xul"?>
+<?xul-overlay href="chrome://messenger/content/mailOverlay.xul"?>
 
 <!DOCTYPE window SYSTEM "chrome://messenger/locale/messenger.dtd">