diff --git a/modules/purchase_trade/fee.py b/modules/purchase_trade/fee.py
index ca5f1e2..632d0c6 100755
--- a/modules/purchase_trade/fee.py
+++ b/modules/purchase_trade/fee.py
@@ -479,7 +479,7 @@ class Fee(ModelSQL,ModelView):
             journal=journal,
             period=period,
             date=date,
-            origin=self,
+            origin=None,
             description=description,
             lines=[move_line,move_line_],
             )