diff --git a/packages/@aws-cdk/aws-lambda-dotnet-alpha/rosetta/default.ts-fixture b/packages/@aws-cdk/aws-lambda-dotnet-alpha/rosetta/default.ts-fixture
index fa5b228c4ec7f..651d9d649a3ab 100644
--- a/packages/@aws-cdk/aws-lambda-dotnet-alpha/rosetta/default.ts-fixture
+++ b/packages/@aws-cdk/aws-lambda-dotnet-alpha/rosetta/default.ts-fixture
@@ -1,6 +1,7 @@
 // Fixture with packages imported, but nothing else
 import { Construct } from 'constructs';
-import { DockerImage, Stack } from '@aws-cdk/core';
+import { DockerImage, Stack, BundlingFileAccess } from 'aws-cdk-lib';
+import { Runtime } from 'aws-cdk-lib/aws-lambda';
 import * as dotnet from '@aws-cdk/aws-lambda-dotnet-alpha';
 
 class Fixture extends Stack {