diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index ee4665ceff1..5f3f3474105 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -2130,7 +2130,7 @@ class stock_move(osv.osv):
             prodlot_id = partial_datas and partial_datas.get('move%s_prodlot_id' % (move.id), False)
             if prodlot_id:
                 self.write(cr, uid, [move.id], {'prodlot_id': prodlot_id}, context=context)
-            if move.state not in ('confirmed','done'):
+            if move.state not in ('confirmed','done','assigned'):
                 self.action_confirm(cr, uid, move_ids, context=context)
 
         self.write(cr, uid, move_ids, {'state': 'done', 'date_planned': time.strftime('%Y-%m-%d %H:%M:%S')}, context=context)