diff --git a/partner_address_street3/model/partner.py b/partner_address_street3/model/partner.py
index c4ebd6442..832e6d9cb 100644
--- a/partner_address_street3/model/partner.py
+++ b/partner_address_street3/model/partner.py
@@ -20,7 +20,6 @@
 ##############################################################################
 from openerp.osv import orm, fields
 from openerp.addons.base.res import res_partner
-res_partner.ADDRESS_FIELDS = res_partner.ADDRESS_FIELDS + ('street3',)
 
 
 class res_partner(orm.Model):
@@ -31,6 +30,12 @@ class res_partner(orm.Model):
         'street3': fields.char('Street 3'),
     }
 
+    def _commercial_fields(self, cr, uid, context=None):
+        fields = super(res_partner, self
+                       )._commercial_fields(cr, uid, context=context)
+        fields.append('street3')
+        return fields
+
 
 class res_country(orm.Model):
     """Override default adresses formatting of coutries"""