diff --git a/modules/purchase_trade/fee.py b/modules/purchase_trade/fee.py
index 2e28aca..b8da907 100755
--- a/modules/purchase_trade/fee.py
+++ b/modules/purchase_trade/fee.py
@@ -130,7 +130,7 @@ class Fee(ModelSQL,ModelView):
             if line.lots:
                 qt = sum([e.get_current_quantity_converted(0,self.unit) for e in line.lots])
                 qt_ = sum([e.get_current_quantity_converted(0) for e in line.lots])
-                unit = line.lots[0].lot_unit_line
+                unit = line.lots[0].lot_unit
                 logger.info("ON_CHANGE_WITH_QT0:%s",qt)
         logger.info("ON_CHANGE_WITH_SI:%s",self.shipment_in)
         if self.shipment_in:
@@ -140,7 +140,7 @@ class Fee(ModelSQL,ModelView):
             if lots:
                 qt = sum([e.get_current_quantity_converted(0,self.unit) for e in lots])
                 qt_ = sum([e.get_current_quantity_converted(0) for e in lots])
-                unit = lots[0].lot_unit_line
+                unit = lots[0].lot_unit
         if not qt:
             logger.info("ON_CHANGE_WITH_QT1:%s",qt)
             LotQt = Pool().get('lot.qt')