diff --git a/doc/api/resources/auto_checkin_rules.rst b/doc/api/resources/auto_checkin_rules.rst
index 83c20c82f3..cdd292861f 100644
--- a/doc/api/resources/auto_checkin_rules.rst
+++ b/doc/api/resources/auto_checkin_rules.rst
@@ -71,7 +71,7 @@ Endpoints
             "mode": "placed",
             "all_sales_channels": false,
             "limit_sales_channels": ["web"],
-            "all_products": False,
+            "all_products": false,
             "limit_products": [2, 3],
             "limit_variations": [456],
             "all_payment_methods": true,
@@ -113,7 +113,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,
@@ -146,7 +146,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,
@@ -167,7 +167,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,
@@ -216,7 +216,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,
diff --git a/src/pretix/plugins/autocheckin/api.py b/src/pretix/plugins/autocheckin/api.py
index c20a61546c..326dd2a75c 100644
--- a/src/pretix/plugins/autocheckin/api.py
+++ b/src/pretix/plugins/autocheckin/api.py
@@ -25,12 +25,19 @@ from rest_framework import serializers, viewsets
 
 from pretix.api.pagination import TotalOrderingFilter
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
-from pretix.base.models import ItemVariation
+from pretix.base.models import ItemVariation, SalesChannel
 from pretix.plugins.autocheckin.models import AutoCheckinRule
 from pretix.plugins.sendmail.models import Rule
 
 
 class AutoCheckinRuleSerializer(I18nAwareModelSerializer):
+    limit_sales_channels = serializers.SlugRelatedField(
+        slug_field="identifier",
+        queryset=SalesChannel.objects.none(),
+        required=False,
+        allow_empty=True,
+        many=True,
+    )
 
     class Meta:
         model = AutoCheckinRule