diff --git a/addons/project/project.py b/addons/project/project.py
index 7f56b573ebb..8487006f8b6 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -808,7 +808,7 @@ class task(base_stage, osv.osv):
             }),
         'progress': fields.function(_hours_get, string='Progress (%)', multi='hours', group_operator="avg", help="If the task has a progress of 99.99% you should close the task if it's finished or reevaluate the time",
             store = {
-                'project.task': (lambda self, cr, uid, ids, c={}: ids, ['work_ids', 'remaining_hours', 'planned_hours','state'], 10),
+                'project.task': (lambda self, cr, uid, ids, c={}: ids, ['work_ids', 'remaining_hours', 'planned_hours', 'state', 'stage_id'], 10),
                 'project.task.work': (_get_task, ['hours'], 10),
             }),
         'delay_hours': fields.function(_hours_get, string='Delay Hours', multi='hours', help="Computed as difference between planned hours by the project manager and the total hours of the task.",