diff --git a/sale.py b/sale.py
index e3b7ee6..6276ac6 100644
--- a/sale.py
+++ b/sale.py
@@ -184,7 +184,9 @@ class SaleLine(metaclass=PoolMeta):
             If(Eval('_parent_sale.sale_type') == 'maintenance',
                [('type', '=', 'service'),
                 ('maintenance_activity', '=', True)], []))
-    
+        cls.product.domain.append(If(Eval('_parent_sale.sale_type') == 'replaces',
+               [('replacement', '=', True)], []))
+
         
     def on_change_with_unit_digits(self, name=None):
         if self.unit: