diff --git a/addons/account/account_invoice.py b/addons/account/account_invoice.py
index 27881bf1280..a59e52c3ce5 100644
--- a/addons/account/account_invoice.py
+++ b/addons/account/account_invoice.py
@@ -619,6 +619,7 @@ class account_invoice(osv.osv):
             'move_id':False,
             'move_name':False,
             'internal_number': False,
+            'period_id': False,
         })
         if 'date_invoice' not in default:
             default.update({