diff --git a/addons/project/project.py b/addons/project/project.py
index 40fb6bb4efd..3c7c180ebb3 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -1203,7 +1203,7 @@ class task(base_stage, osv.osv):
                     act = 'do_%s' % res.group(2).lower()
         if act:
             getattr(self,act)(cr, uid, ids, context=context)
-        return super(task,self).message_update(cr, uid, msg, update_vals=update_vals, context=context)
+        return super(task,self).message_update(cr, uid, ids, msg, update_vals=update_vals, context=context)
 
     def project_task_reevaluate(self, cr, uid, ids, context=None):
         if self.pool.get('res.users').has_group(cr, uid, 'project.group_time_work_estimation_tasks'):