diff --git a/htdocs/product/stock/class/mouvementstock.class.php b/htdocs/product/stock/class/mouvementstock.class.php
index 8219da2b81469..9e508f41461a2 100644
--- a/htdocs/product/stock/class/mouvementstock.class.php
+++ b/htdocs/product/stock/class/mouvementstock.class.php
@@ -28,7 +28,7 @@
 /**
  *	Class to manage stock movements
  */
-class MouvementStock
+class MouvementStock extends CommonObject
 {
     var $error;
     var $db;