diff --git a/src/Glpi/Controller/Knowbase/KnowbaseItemController.php b/src/Glpi/Controller/Knowbase/KnowbaseItemController.php
index bc20148ae57..9f59aebaea2 100644
--- a/src/Glpi/Controller/Knowbase/KnowbaseItemController.php
+++ b/src/Glpi/Controller/Knowbase/KnowbaseItemController.php
@@ -40,6 +40,7 @@
 use Glpi\Exception\Http\NotFoundHttpException;
 use Glpi\RichText\RichText;
 use KnowbaseItem;
+use Session;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\StreamedResponse;