diff --git a/addons/crm/crm_lead.py b/addons/crm/crm_lead.py
index 146417a7abb..f83bdb626f5 100644
--- a/addons/crm/crm_lead.py
+++ b/addons/crm/crm_lead.py
@@ -291,16 +291,17 @@ class crm_lead(base_stage, osv.osv):
 
     def on_change_partner(self, cr, uid, ids, partner_id, context=None):
         result = {}
+        values={}
         if partner_id:
             partner = self.pool.get('res.partner').browse(cr, uid, partner_id, context=context)
-            values = {
+            values = values.update({
                 'partner_name' : partner.name, 
                 'street' : partner.street,
                 'street2' : partner.street2,
                 'city' : partner.city,
                 'state_id' : partner.state_id and partner.state_id.id or False,
                 'country_id' : partner.country_id and partner.country_id.id or False,
-            }
+            })
         return {'value' : values}