diff --git a/src/pretix/api/serializers/checkin.py b/src/pretix/api/serializers/checkin.py
index 63759c0160..300e4352df 100644
--- a/src/pretix/api/serializers/checkin.py
+++ b/src/pretix/api/serializers/checkin.py
@@ -85,6 +85,7 @@ class CheckinRPCRedeemInputSerializer(serializers.Serializer):
     ignore_unpaid = serializers.BooleanField(default=False, required=False)
     questions_supported = serializers.BooleanField(default=True, required=False)
     use_order_locale = serializers.BooleanField(default=False, required=False)
+    media_exchange_supported = serializers.BooleanField(default=False, required=False)
     nonce = serializers.CharField(required=False, allow_null=True)
     datetime = serializers.DateTimeField(required=False, allow_null=True)
     answers = serializers.JSONField(required=False, allow_null=True)