diff --git a/modules/purchase_trade/fee.py b/modules/purchase_trade/fee.py
index a4d6c75..ca5f1e2 100755
--- a/modules/purchase_trade/fee.py
+++ b/modules/purchase_trade/fee.py
@@ -428,11 +428,11 @@ class Fee(ModelSQL,ModelView):
         move_line = AccountMoveLine()
         move_line.lot = lot
         move_line.fee = self
-        move_line.origin = self
+        move_line.origin = None
         move_line_ = AccountMoveLine()
         move_line_.lot = lot
         move_line_.fee = self
-        move_line_.origin = self
+        move_line_.origin = None
         amount = self.amount
         
         if self.currency != company.currency: