diff --git a/mozilla/xpfe/global/resources/content/bindings/browser.xml b/mozilla/xpfe/global/resources/content/bindings/browser.xml
index 4932867cb36..c9390891389 100644
--- a/mozilla/xpfe/global/resources/content/bindings/browser.xml
+++ b/mozilla/xpfe/global/resources/content/bindings/browser.xml
@@ -450,7 +450,6 @@
             this.mDragDropHandler.detach();
           this.mDragDropHandler = null;
 
-          this.securityUI = null;
           this.focusedWindow = null;
           this.focusedElement = null;
           this._webBrowserFind = null;