--- a/dom/interfaces/xul/nsIDOMXULSelectCntrlEl.idl
+++ b/dom/interfaces/xul/nsIDOMXULSelectCntrlEl.idl
@@ -7,16 +7,14 @@
 interface nsIDOMXULSelectControlItemElement;
 
 [scriptable, uuid(9bf188a7-d6f9-431b-b5c7-118013998e8b)]
 interface nsIDOMXULSelectControlElement : nsIDOMXULControlElement {
   attribute nsIDOMXULSelectControlItemElement selectedItem;
   attribute long selectedIndex;
 
   attribute DOMString value;
-  
-  nsIDOMXULSelectControlItemElement appendItem(in DOMString label, in DOMString value);
 
   readonly attribute unsigned long itemCount;
   long getIndexOfItem(in nsIDOMXULSelectControlItemElement item);
   nsIDOMXULSelectControlItemElement getItemAtIndex(in long index);
 };