diff --git a/extensions/mentions/src/ConfigureMentions.php b/extensions/mentions/src/ConfigureMentions.php
index 3a31114a3..6061ec1f4 100644
--- a/extensions/mentions/src/ConfigureMentions.php
+++ b/extensions/mentions/src/ConfigureMentions.php
@@ -12,6 +12,8 @@
 namespace Flarum\Mentions;
 
 use Flarum\Http\UrlGenerator;
+use Flarum\Post\CommentPost;
+use Flarum\User\User;
 use s9e\TextFormatter\Configurator;
 
 class ConfigureMentions