diff --git a/classes/controller/AdminController.php b/classes/controller/AdminController.php
index bd5789190..bfda6b83d 100644
--- a/classes/controller/AdminController.php
+++ b/classes/controller/AdminController.php
@@ -2046,9 +2046,10 @@ class AdminControllerCore extends Controller
 		{
 			$order_by_split = preg_split('/[.!]/', $order_by);
 			$order_by = pSQL($order_by_split[0]).'.`'.pSQL($order_by_split[1]).'`';
+			$this->_orderBy = (isset($order_by_split) && isset($order_by_split[1])) ? $order_by_split[1] : $order_by;
 		}
-
-		$this->_orderBy = $order_by_split[1];
+		else
+			$this->_orderBy = $order_by;
 		$this->_orderWay = Tools::strtoupper($order_way);
 
 		/* SQL table : orders, but class name is Order */