diff --git a/Models/Navigation.php b/Models/Navigation.php
index 1c532cf..3ac3be9 100644
--- a/Models/Navigation.php
+++ b/Models/Navigation.php
@@ -93,7 +93,7 @@ class Navigation
                 $i++;
             }
 
-            $uriPdo = rtrim($uriPdo, ',');
+            $uriPdo = \rtrim($uriPdo, ',');
             $sth    = $this->dbPool->get('select')->con->prepare('SELECT * FROM `' . $this->dbPool->get('select')->prefix . 'nav` WHERE `nav_pid` IN(' . $uriPdo . ') ORDER BY `nav_order` ASC');
 
             $i = 1;