diff --git a/xpinstall/public/nsIUpdateNotification.idl b/xpinstall/public/nsIUpdateNotification.idl
new file mode 100644
index 00000000000..75b4086330e
--- /dev/null
+++ b/xpinstall/public/nsIUpdateNotification.idl
@@ -0,0 +1,30 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Mozilla Communicator client code, 
+ * released March 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications 
+ * Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ */
+
+#include "nsISupports.idl"
+
+[uuid(6cb61472-042c-11d4-ac85-00c04fa0d26b)]
+interface nsIUpdateNotification : nsISupports
+{
+    void displayUpdateDialog();
+};