diff --git a/facturier/views.py b/facturier/views.py
index 926dc6a..5ee84a4 100644
--- a/facturier/views.py
+++ b/facturier/views.py
@@ -249,7 +249,7 @@ class TransactionView(DetailView):
         self.create_event(event.transaction_id, invoice_id, status,
                 response=True, message='response', details=response.__dict__)
         logger.debug('payment response: update invoice PAID %s -- context %s' %
-            (update_url, context))
+            (self.object.get_invoice_url, context))
         self.invoice_rest_request(self.object.get_invoice_update_url, context)
 
         # ok !