diff --git a/sale.py b/sale.py
index 7d43eb7..878c9a4 100644
--- a/sale.py
+++ b/sale.py
@@ -13,8 +13,7 @@ __metaclass__ = PoolMeta
 class Sale:
     __name__ = 'sale.sale'
     carrier_domain = fields.Function(fields.One2Many('carrier', None,
-            'Carrier Domain', on_change_with=['shipment_address', 'party'],
-            depends=['shipment_address', 'party']),
+            'Carrier Domain', depends=['shipment_address', 'party']),
         'on_change_with_carrier_domain')
 
     @classmethod
@@ -39,7 +38,7 @@ class Sale:
             if 'carrier_domain' not in cls.carrier.depends:
                 cls.carrier.depends.append('carrier_domain')
 
-    @fields.depends('shipment_address')
+    @fields.depends('shipment_address', 'party')
     def on_change_with_carrier_domain(self, name=None):
         Carrier = Pool().get('carrier')
         shipment_zip = (self.shipment_address and self.shipment_address.zip