diff --git a/sale.py b/sale.py
index a89ac27..f73ed7c 100644
--- a/sale.py
+++ b/sale.py
@@ -35,8 +35,10 @@ class Sale(metaclass=PoolMeta):
                                          depends=['sale_type'])
 
     contract_ref = fields.Reference("Contract Base", selection='get_origin_contract',
-                                    #domain=[('party', '=', Eval('party')),
-                                    #        ('state', '=', 'closed')],
+                                    domain={'optical_equipment.contract': [
+                                        ('party', '=', Eval('party')),
+                                        ('state', '=', 'closed'),
+                                    ]},
                                     states={'invisible': (Eval('sale_type') != 'maintenance')},
                                     search_context={
                                        'related_party': Eval('party'),