diff --git a/src/pretix/base/services/orders.py b/src/pretix/base/services/orders.py
index 266108675e..6fc2b02f81 100644
--- a/src/pretix/base/services/orders.py
+++ b/src/pretix/base/services/orders.py
@@ -41,8 +41,6 @@ error_messages = {
     'internal': _("An internal error occured, please try again."),
     'busy': _('We were not able to process your request completely as the '
               'server was too busy. Please try again.'),
-    'voucher_redeemed': _('A voucher you tried to use already has been used.'),
-    'voucher_expired': _('A voucher you tried to use has expired.'),
     'not_started': _('The presale period for this event has not yet started.'),
     'ended': _('The presale period has ended.'),
     'voucher_invalid': _('This voucher code is not known in our database.'),