--- a/dom/webidl/DecoderDoctorNotification.webidl
+++ b/dom/webidl/DecoderDoctorNotification.webidl
@@ -1,15 +1,16 @@
 /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
 enum DecoderDoctorNotificationType {
   "cannot-play",
+  "platform-decoder-not-found",
   "can-play-but-some-missing-decoders"
 };
 
 dictionary DecoderDoctorNotification {
   required DecoderDoctorNotificationType type;
   DOMString formats;
 };