diff --git a/classes/stock/Warehouse.php b/classes/stock/Warehouse.php
index 8469b71c9..fdaf63fc3 100644
--- a/classes/stock/Warehouse.php
+++ b/classes/stock/Warehouse.php
@@ -208,16 +208,16 @@ class WarehouseCore extends ObjectModel
 	{
 		Db::getInstance()->execute('
 			DELETE FROM '._DB_PREFIX_.'`warehouse_product_location` wpl
-			WHERE wpl.id_product = '.(int)$id_product.'
-			AND wpl.id_product_attribute = '.(int)$id_product_attribute.'
-			AND wpl.id_warehouse = '.(int)$id_warehouse);
+			WHERE wpl.`id_product` = '.(int)$id_product.'
+			AND wpl.`id_product_attribute` = '.(int)$id_product_attribute.'
+			AND wpl.`id_warehouse` = '.(int)$id_warehouse);
 
 		$query = '
-			UPDATE '._DB_PREFIX_.'warehouse_product_location
-			SET location = '.pSQL($location).'
-			WHERE id_product = '.(int)$id_product.'
-			AND id_product_attribute = '.(int)$id_product_attribute.'
-			AND id_warehouse = '.(int)$id_warehouse;
+			UPDATE '._DB_PREFIX_.'`warehouse_product_location`
+			SET `location` = \''.pSQL($location).'\'
+			WHERE `id_product` = '.(int)$id_product.'
+			AND `id_product_attribute` = '.(int)$id_product_attribute.'
+			AND `id_warehouse` = '.(int)$id_warehouse;
 
 		return (Db::getInstance()->execute($query));
 	}