diff --git a/graphql/schema/types/filters.graphql b/graphql/schema/types/filters.graphql
index d0d6a4b65..e6b05cd6e 100644
--- a/graphql/schema/types/filters.graphql
+++ b/graphql/schema/types/filters.graphql
@@ -648,6 +648,8 @@ input TagFilterType {
 
   "Filter by last update time"
   updated_at: TimestampCriterionInput
+
+  custom_fields: [CustomFieldCriterionInput!]
 }
 
 input ImageFilterType {