diff --git a/mozilla/mailnews/addrbook/public/nsIAbManager.idl b/mozilla/mailnews/addrbook/public/nsIAbManager.idl
index f09cc2ba9c5..1f7c28d6992 100644
--- a/mozilla/mailnews/addrbook/public/nsIAbManager.idl
+++ b/mozilla/mailnews/addrbook/public/nsIAbManager.idl
@@ -41,7 +41,6 @@ interface nsIDOMWindow;
 interface nsIAbDirectory;
 interface nsIAbCard;
 interface nsIAbDirectoryProperties;
-interface nsISupportsArray;
 interface nsIRDFDataSource;
 
 [scriptable, uuid(0823e46e-8802-42d5-b91b-7e4816c8d2f0)]