diff --git a/browser/base/content/utilityOverlay.js b/browser/base/content/utilityOverlay.js
index 5548ab4830c..8b8acda5148 100644
--- a/browser/base/content/utilityOverlay.js
+++ b/browser/base/content/utilityOverlay.js
@@ -42,7 +42,6 @@
  * for shared application glue for the Communicator suite of applications
  **/
 
-var goPrefWindow = 0;
 var gBidiUI = false;
 
 function getBrowserURL()