diff --git a/controllers/admin/AdminCarriersController.php b/controllers/admin/AdminCarriersController.php
index a4fc629a8..c54d9000d 100644
--- a/controllers/admin/AdminCarriersController.php
+++ b/controllers/admin/AdminCarriersController.php
@@ -126,10 +126,12 @@ class AdminCarriersControllerCore extends AdminController
 						'cast' => 'intval',
 						'type' => 'select',
 						'identifier' => 'id_carrier',
-						'list' => array(
-							-1 => array('id_carrier' => -1, 'name' => $this->l('Best price')),
-							-2 =>  array('id_carrier' => -2, 'name' => $this->l('Best grade'))) +
-							Carrier::getCarriers((int)Configuration::get('PS_LANG_DEFAULT'), true, false, false, null, Carrier::ALL_CARRIERS)
+						'list' => array_merge(
+							array(
+								-1 => array('id_carrier' => -1, 'name' => $this->l('Best price')),
+								-2 => array('id_carrier' => -2, 'name' => $this->l('Best grade'))
+							),
+							Carrier::getCarriers((int)Configuration::get('PS_LANG_DEFAULT'), true, false, false, null, Carrier::ALL_CARRIERS))
 					),
 					'PS_CARRIER_DEFAULT_SORT' => array(
 						'title' => $this->l('Sort by:'),