diff --git a/packages/@aws-cdk/aws-appsync/lib/graphqlapi.ts b/packages/@aws-cdk/aws-appsync/lib/graphqlapi.ts
index 3a3eeb6b6e41a..b15f81c6aeb2d 100644
--- a/packages/@aws-cdk/aws-appsync/lib/graphqlapi.ts
+++ b/packages/@aws-cdk/aws-appsync/lib/graphqlapi.ts
@@ -643,10 +643,11 @@ export class GraphqlApi extends GraphqlApiBase {
         ManagedPolicy.fromAwsManagedPolicyName('service-role/AWSAppSyncPushToCloudWatchLogs'),
       ],
     }).roleArn;
+    const fieldLogLevel: FieldLogLevel = config.fieldLogLevel ?? FieldLogLevel.NONE;
     return {
       cloudWatchLogsRoleArn: logsRoleArn,
       excludeVerboseContent: config.excludeVerboseContent,
-      fieldLogLevel: config.fieldLogLevel,
+      fieldLogLevel: fieldLogLevel,
     };
   }