diff --git a/openerp/addons/base/res/res_partner.py b/openerp/addons/base/res/res_partner.py
index d140fe62ccc..c8c5ddf2acc 100644
--- a/openerp/addons/base/res/res_partner.py
+++ b/openerp/addons/base/res/res_partner.py
@@ -259,8 +259,8 @@ class res_partner(osv.osv, format_address):
         'street2': fields.char('Street2', size=128),
         'zip': fields.char('Zip', change_default=True, size=24),
         'city': fields.char('City', size=128),
-        'state_id': fields.many2one("res.country.state", 'State'),
-        'country_id': fields.many2one('res.country', 'Country'),
+        'state_id': fields.many2one("res.country.state", 'State', ondelete='restrict'),
+        'country_id': fields.many2one('res.country', 'Country', ondelete='restrict'),
         'country': fields.related('country_id', type='many2one', relation='res.country', string='Country',
                                   deprecated="This field will be removed as of OpenERP 7.1, use country_id instead"),
         'email': fields.char('Email', size=240),