diff --git a/openerp/addons/base/res/res_widget.py b/openerp/addons/base/res/res_widget.py
index 81be708a331..71bdd85fc21 100644
--- a/openerp/addons/base/res/res_widget.py
+++ b/openerp/addons/base/res/res_widget.py
@@ -38,7 +38,7 @@ class res_widget_user(osv.osv):
     _order = "sequence"
     _columns = {
         'sequence': fields.integer('Sequence'),
-        'user_id': fields.many2one('res.users','User', select=1),
+        'user_id': fields.many2one('res.users','User', select=1, ondelete='cascade'),
         'widget_id': fields.many2one('res.widget','Widget',required=True, ondelete='cascade'),
     }