diff --git a/extensions/sticky/js/forum/dist/extension.js b/extensions/sticky/js/forum/dist/extension.js
index 971b22472..d68918337 100644
--- a/extensions/sticky/js/forum/dist/extension.js
+++ b/extensions/sticky/js/forum/dist/extension.js
@@ -133,7 +133,7 @@ System.register('flarum/sticky/components/DiscussionStickiedPost', ['flarum/comp
 
         function DiscussionStickiedPost() {
           babelHelpers.classCallCheck(this, DiscussionStickiedPost);
-          return babelHelpers.possibleConstructorReturn(this, Object.getPrototypeOf(DiscussionStickiedPost).apply(this, arguments));
+          return babelHelpers.possibleConstructorReturn(this, (DiscussionStickiedPost.__proto__ || Object.getPrototypeOf(DiscussionStickiedPost)).apply(this, arguments));
         }
 
         babelHelpers.createClass(DiscussionStickiedPost, [{