diff --git a/synchro_orleans/data/management/commands/email_new_invoices.py b/synchro_orleans/data/management/commands/email_new_invoices.py
index 0e3717b..d0635a8 100644
--- a/synchro_orleans/data/management/commands/email_new_invoices.py
+++ b/synchro_orleans/data/management/commands/email_new_invoices.py
@@ -94,9 +94,7 @@ class Command(BaseCommand):
             except (KeyError, ValueError):
                 continue
             attachment = os.path.join(settings.INVOICES_DIR, 'facture_%s.pdf' % invoice.id)
-            invoice_hash = self.get_invoice_hash(invoice.id,
-                                                 invoice.date_generation,
-                                                 invoice.montant)
+            invoice_hash = self.get_invoice_hash(invoice.id, invoice.date_generation)
 
             context = {'invoice': invoice, 'invoice_view_url_base': invoice_view_url_base,
                        'invoice_hash': invoice_hash}