diff --git a/extensions/likes/js/src/admin/index.js b/extensions/likes/js/src/admin/index.js
index eb47c9e8e..4bdd76fc6 100644
--- a/extensions/likes/js/src/admin/index.js
+++ b/extensions/likes/js/src/admin/index.js
@@ -3,11 +3,11 @@ import app from 'flarum/app';
 import PermissionGrid from 'flarum/components/PermissionGrid';
 
 app.initializers.add('flarum-likes', () => {
-  extend(PermissionGrid.prototype, 'replyItems', items => {
-    items.add('likePosts', {
+  app.extensionData
+    .for('flarum-likes')
+    .registerPermission({
       icon: 'far fa-thumbs-up',
       label: app.translator.trans('flarum-likes.admin.permissions.like_posts_label'),
       permission: 'discussion.likePosts'
-    });
-  });
+    }, 'reply');
 });