diff --git a/classes/Product.php b/classes/Product.php
index 267005dff..181f7620d 100644
--- a/classes/Product.php
+++ b/classes/Product.php
@@ -202,6 +202,8 @@ class ProductCore extends ObjectModel
 	 * @var boolean Tells if the product uses the advanced stock management
 	 */
 	public $advanced_stock_management = 0;
+	public $out_of_stock;
+	public $depends_on_stock;
 
 	public $isFullyLoaded = false;