diff --git a/modules/purchase_trade/fee.py b/modules/purchase_trade/fee.py
index ac47466..050b693 100755
--- a/modules/purchase_trade/fee.py
+++ b/modules/purchase_trade/fee.py
@@ -100,7 +100,7 @@ class Fee(ModelSQL,ModelView):
         if lqt:
             return lqt[0].id 
     
-    @fields.depends('unit','auto_calculation','mode','_parent_line.unit','_parent_line.lots','_parent_sale_line.unit','_parent_sale_line.lots','_parent_shipment_in.id')
+    @fields.depends('line','sale_line','unit','auto_calculation','mode','_parent_line.unit','_parent_line.lots','_parent_sale_line.unit','_parent_sale_line.lots','_parent_shipment_in.id')
     def on_change_with_quantity(self, name=None):
         qt = None
         unit = None