diff --git a/packages/@aws-cdk/aws-lambda-event-sources/README.md b/packages/@aws-cdk/aws-lambda-event-sources/README.md
index 9f33fb689b54d..b1fec3c4c78a7 100644
--- a/packages/@aws-cdk/aws-lambda-event-sources/README.md
+++ b/packages/@aws-cdk/aws-lambda-event-sources/README.md
@@ -64,8 +64,8 @@ const queue = new sqs.Queue(this, 'MyQueue', {
 });
 
 lambda.addEventSource(new SqsEventSource(queue, {
-  batchSize: 10 // default
-});
+  batchSize: 10, // default
+}));
 ```
 
 ### S3