diff --git a/modules/purchase_trade/fee.py b/modules/purchase_trade/fee.py
index 563c459..4c44b85 100755
--- a/modules/purchase_trade/fee.py
+++ b/modules/purchase_trade/fee.py
@@ -131,6 +131,7 @@ class Fee(ModelSQL,ModelView):
                 qt = sum([e.get_current_quantity_converted(0,self.unit) for e in line.lots])
                 unit = line.lots[0].lot_unit_line
                 logger.info("ON_CHANGE_WITH_QT0:%s",qt)
+        logger.info("ON_CHANGE_WITH_SI:%s",self.shipment_in)
         if self.shipment_in:
             Lot = Pool().get('lot.lot')
             lots = Lot.search([('lot_shipment_in','=',self.shipment_in.id)])