diff --git a/apollo-ios-codegen/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift b/apollo-ios-codegen/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift
index 5ea9fa82e..fbaa2e930 100644
--- a/apollo-ios-codegen/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift
+++ b/apollo-ios-codegen/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift
@@ -271,6 +271,7 @@ public struct ApolloSchemaDownloader {
           kind
           name
           description
+          isOneOf
           fields(includeDeprecated: true) {
             name
             description