diff --git a/plugins/UsersManager/Model.php b/plugins/UsersManager/Model.php
index 97c3f20e823..f6b453e4e93 100644
--- a/plugins/UsersManager/Model.php
+++ b/plugins/UsersManager/Model.php
@@ -179,7 +179,7 @@ public function addUser($userLogin, $passwordTransformed, $email, $alias, $token
 
     public function setSuperUserAccess($userLogin, $hasSuperUserAccess)
     {
-        $this->getDb()->update(Common::prefixTable('user'),//$this->table,
+        $this->getDb()->update($this->table,
             array(
                 'superuser_access' => $hasSuperUserAccess ? 1 : 0
             ),