diff --git a/js/src/forum/components/Post.js b/js/src/forum/components/Post.js
index 93f6141b7..5fd0c8e5f 100644
--- a/js/src/forum/components/Post.js
+++ b/js/src/forum/components/Post.js
@@ -114,7 +114,8 @@ export default class Post extends Component {
    * @return {import('mithril').Children}
    */
   content() {
-    return null;
+    // TODO: [Flarum 2.0] return `null`
+    return [];
   }
 
   /**