diff --git a/addons/mail/mail_thread.py b/addons/mail/mail_thread.py
index 943bc5f0164..0029dc7ca9f 100644
--- a/addons/mail/mail_thread.py
+++ b/addons/mail/mail_thread.py
@@ -719,7 +719,7 @@ class mail_thread(osv.AbstractModel):
             subtype_ids = subtype_obj.search(cr, uid, [('default', '=', True), '|', ('res_model', '=', self._name), ('res_model', '=', False)], context=context)
         # update the subscriptions
         fol_obj = self.pool.get('mail.followers')
-        fol_ids = fol_obj.search(cr, uid, [('res_model', '=', self._name), ('res_id', 'in', ids), ('partner_id', 'in', partner_ids)], context=context)
+        fol_ids = fol_obj.search(cr, 1, [('res_model', '=', self._name), ('res_id', 'in', ids), ('partner_id', 'in', partner_ids)], context=context)
         fol_obj.write(cr, uid, fol_ids, {'subtype_ids': [(6, 0, subtype_ids)]}, context=context)
         return True