diff --git a/htdocs/core/boxes/box_task.php b/htdocs/core/boxes/box_task.php
index 94983ef6bff..6e25fb934ad 100644
--- a/htdocs/core/boxes/box_task.php
+++ b/htdocs/core/boxes/box_task.php
@@ -84,7 +84,7 @@ class box_task extends ModeleBoxes
         $projectstatic = new Project($this->db);
 		$taskstatic = new Task($this->db);
 		$form = new Form($this->db);
-        $cookie_name = 'boxfilter_task';
+        $cookie_name = 'DOLUSERCOOKIE_boxfilter_task';
         $boxcontent = '';
         $socid = $user->socid;