diff --git a/src/pretix/base/services/cart.py b/src/pretix/base/services/cart.py
index e243f0edc..52b81ce9a 100644
--- a/src/pretix/base/services/cart.py
+++ b/src/pretix/base/services/cart.py
@@ -141,9 +141,10 @@ error_messages = {
     'price_not_a_number': gettext_lazy('The entered price is not a number.'),
     'price_too_high': gettext_lazy('The entered price is to high.'),
     'voucher_invalid': gettext_lazy('This voucher code is not known in our database.'),
-    'voucher_min_usages': gettext_lazy(
-        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s '
-        'matching products.'
+    'voucher_min_usages': ngettext_lazy(
+        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products.',
+        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products.',
+        'number'
     ),
     'voucher_min_usages_removed': ngettext_lazy(
         'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products. '