diff --git a/Controller.php b/Controller.php
index 15a452d..ead3432 100644
--- a/Controller.php
+++ b/Controller.php
@@ -21,6 +21,7 @@ use phpOMS\Module\WebInterface;
 use phpOMS\Views\View;
 use phpOMS\Asset\AssetType;
 use phpOMS\Account\PermissionType;
+use phpOMS\Message\Http\RequestStatusCode;
 
 use Modules\Knowledgebase\Models\WikiCategoryMapper;
 use Modules\Knowledgebase\Models\NullWikiCategory;