diff --git a/addons/crm/res_partner.py b/addons/crm/res_partner.py
index acf212a2305..31c45969f8e 100644
--- a/addons/crm/res_partner.py
+++ b/addons/crm/res_partner.py
@@ -46,6 +46,14 @@ class res_partner(osv.osv):
         'meeting_count': fields.function(_opportunity_meeting_count, string="Meeting", type='integer', multi='opp_meet'),
     }
 
+    def copy(self, cr, uid, record_id, default=None, context=None):
+        if default is None:
+            default = {}
+
+        default.update({'opportunity_ids': [], 'meeting_ids' : [], 'phonecall_ids' : []})
+
+        super(res_partner, self).copy(cr, uid, record_id, default, context)
+
     def redirect_partner_form(self, cr, uid, partner_id, context=None):
         search_view = self.pool.get('ir.model.data').get_object_reference(cr, uid, 'base', 'view_res_partner_filter')
         value = {