diff --git a/mozilla/toolkit/content/widgets/browser.xml b/mozilla/toolkit/content/widgets/browser.xml
index 910f9703296..c86ad034169 100644
--- a/mozilla/toolkit/content/widgets/browser.xml
+++ b/mozilla/toolkit/content/widgets/browser.xml
@@ -474,7 +474,7 @@
 
             var event = document.createEvent("Events");
             event.initEvent("DOMUpdatePageReport", true, true);
-            n.dispatchEvent(event);
+            tabBrowser.dispatchEvent(event);
           ]]>
         </body>
       </method>