diff --git a/dom/mms/interfaces/nsIMmsService.idl b/dom/mms/interfaces/nsIMmsService.idl
new file mode 100644
index 00000000000..45d46bed655
--- /dev/null
+++ b/dom/mms/interfaces/nsIMmsService.idl
@@ -0,0 +1,11 @@
+/* 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/. */
+
+#include "nsISupports.idl"
+
+[scriptable, uuid(217ddd76-75db-4210-955d-8806cd8d87f9)]
+interface nsIMmsService : nsISupports
+{
+  boolean        hasSupport();
+};