diff --git a/addons/crm/crm.py b/addons/crm/crm.py
index edfee9e7614..0b6275598d2 100644
--- a/addons/crm/crm.py
+++ b/addons/crm/crm.py
@@ -281,14 +281,11 @@ class crm_case(object):
         @param part: Partner's id
         @email: Partner's email ID
         """
-        if not part:
-            return {'value': {'partner_address_id': False,
-                            'email_from': False, 
-                            'phone': False
-                            }}
-        addr = self.pool.get('res.partner').address_get(cr, uid, [part], ['contact'])
-        data = {'partner_address_id': addr['contact']}
-        data.update(self.onchange_partner_address_id(cr, uid, ids, addr['contact'])['value'])
+        data={}
+        if  part:
+            addr = self.pool.get('res.partner').address_get(cr, uid, [part], ['contact'])
+            data = {'partner_address_id': addr['contact']}
+            data.update(self.onchange_partner_address_id(cr, uid, ids, addr['contact'])['value'])
         return {'value': data}
 
     def onchange_partner_address_id(self, cr, uid, ids, add, email=False):