diff --git a/resources/media-controls.js b/resources/media-controls.js
index 6ee15015810..383b025ee0e 100644
--- a/resources/media-controls.js
+++ b/resources/media-controls.js
@@ -321,7 +321,7 @@
               break;
           }
           break;
-          break;
+        default:
           throw new Error(`Unknown event ${event.type}`);
       }
     }