diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 6d3a0724006..ae6d193b80f 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -310,6 +310,7 @@ class Product extends CommonObject
 
     public $oldcopy;
 
+    public $fk_default_warehouse;
     /**
      * @var int ID
      */