diff --git a/src/pretix/control/forms/filter.py b/src/pretix/control/forms/filter.py
index a340cdae50..0db1497437 100644
--- a/src/pretix/control/forms/filter.py
+++ b/src/pretix/control/forms/filter.py
@@ -614,6 +614,7 @@ class CheckInFilterForm(FilterForm):
                 | Q(order__email__icontains=u)
                 | Q(attendee_name__icontains=u)
                 | Q(attendee_email__icontains=u)
+                | Q(voucher__code__istartswith=u)
                 | Q(order__invoice_address__name__icontains=u)
                 | Q(order__invoice_address__company__icontains=u)
             )