diff --git a/mozilla/xpfe/appshell/src/nsXULCommand.cpp b/mozilla/xpfe/appshell/src/nsXULCommand.cpp
index e3f219231ac..4e4ab3fb558 100644
--- a/mozilla/xpfe/appshell/src/nsXULCommand.cpp
+++ b/mozilla/xpfe/appshell/src/nsXULCommand.cpp
@@ -186,3 +186,9 @@ nsEventStatus nsXULCommand::MenuSelected(const nsMenuEvent & aMenuEvent)
   return nsEventStatus_eConsumeNoDefault;
 }
 
+nsEventStatus nsXULCommand::MenuDeselected(const nsMenuEvent & aMenuEvent)
+{
+  DoCommand();
+  return nsEventStatus_eConsumeNoDefault;
+}
+
diff --git a/mozilla/xpfe/appshell/src/nsXULCommand.h b/mozilla/xpfe/appshell/src/nsXULCommand.h
index ea621a746a2..136040f4525 100644
--- a/mozilla/xpfe/appshell/src/nsXULCommand.h
+++ b/mozilla/xpfe/appshell/src/nsXULCommand.h
@@ -35,7 +35,7 @@ class nsIDOMEvent;
 
 //----------------------------------------------------------------------
 
-class nsXULCommand : public nsIXULCommand //public nsIMenuListener
+class nsXULCommand : public nsIXULCommand
 
 {
 public:
@@ -58,6 +58,7 @@ public:
 
   // nsIMenuListener 
   virtual nsEventStatus MenuSelected(const nsMenuEvent & aMenuEvent);
+  virtual nsEventStatus MenuDeselected(const nsMenuEvent & aMenuEvent) ;
 
 protected:
   NS_IMETHOD ExecuteJavaScriptString(nsIWebShell* aWebShell, nsString& aJavaScript);