diff --git a/auquotidien/modules/payments.py b/auquotidien/modules/payments.py
index 4ac949d..24d82bd 100644
--- a/auquotidien/modules/payments.py
+++ b/auquotidien/modules/payments.py
@@ -10,6 +10,7 @@ from django.utils.six.moves.urllib import parse as urllib
 
 from quixote import redirect, get_publisher, get_request, get_session, get_response
 from quixote.directory import Directory
+from quixote.errors import QueryError
 from quixote.html import TemplateIO, htmltext
 
 if not set:
@@ -406,7 +407,7 @@ register_item_class(PaymentCancelWorkflowStatusItem)
 def request_payment(invoice_ids, url, add_regie=True):
     for invoice_id in invoice_ids:
         if not Invoice.check_crc(invoice_id):
-            raise errors.QueryError()
+            raise QueryError()
     invoices = [Invoice.get(invoice_id) for invoice_id in invoice_ids]
     invoices = [i for i in invoices if not (i.paid or i.canceled)]
     regie_ids = set([invoice.regie_id for invoice in invoices])
@@ -608,12 +609,12 @@ class PublicPaymentDirectory(Directory):
 
     def init(self):
         if 'invoice_ids' not in get_request().form:
-            raise errors.QueryError()
+            raise QueryError()
         invoice_ids = get_request().form.get('invoice_ids').split(' ')
 
         for invoice_id in invoice_ids:
             if not Invoice.check_crc(invoice_id):
-                raise errors.QueryError()
+                raise QueryError()
 
         url = get_publisher().get_frontoffice_url() + '/payment/back/'