diff --git a/Controller.php b/Controller.php
index 2eb3c80..79c14d7 100644
--- a/Controller.php
+++ b/Controller.php
@@ -28,6 +28,7 @@ use phpOMS\Module\ModuleAbstract;
 use phpOMS\Module\WebInterface;
 use phpOMS\System\MimeType;
 use phpOMS\Views\View;
+use phpOMS\Message\Http\RequestStatusCode;
 
 /**
  * Admin controller class.