diff --git a/addons/crm/crm_lead.py b/addons/crm/crm_lead.py
index 56aa3d4dae3..28f89533ac3 100644
--- a/addons/crm/crm_lead.py
+++ b/addons/crm/crm_lead.py
@@ -440,7 +440,7 @@ class crm_lead(base_stage, format_address, osv.osv):
         for lead in self.browse(cr, uid, ids):
             stage_id = self.stage_find(cr, uid, [lead], lead.section_id.id or False, [('probability', '=', 0.0),('on_change','=',True)], context=context)
             if stage_id:
-                self.case_set(cr, uid, [lead.id], values_to_update={'probability': 0.0}, new_stage_id=stage_id, context=context)
+                self.case_set(cr, uid, [lead.id], values_to_update={'probability': 0.0, 'date_closed': fields.datetime.now()}, new_stage_id=stage_id, context=context)
         return True
 
     def case_mark_won(self, cr, uid, ids, context=None):
@@ -448,7 +448,7 @@ class crm_lead(base_stage, format_address, osv.osv):
         for lead in self.browse(cr, uid, ids):
             stage_id = self.stage_find(cr, uid, [lead], lead.section_id.id or False, [('probability', '=', 100.0),('on_change','=',True)], context=context)
             if stage_id:
-                self.case_set(cr, uid, [lead.id], values_to_update={'probability': 100.0}, new_stage_id=stage_id, context=context)
+                self.case_set(cr, uid, [lead.id], values_to_update={'probability': 100.0, 'date_closed': fields.datetime.now()}, new_stage_id=stage_id, context=context)
         return True
 
     def set_priority(self, cr, uid, ids, priority):