diff --git a/retail/interactive-tutorials/events/write-user-event.js b/retail/interactive-tutorials/events/write-user-event.js
index 8178d872b9..c2d9939fca 100644
--- a/retail/interactive-tutorials/events/write-user-event.js
+++ b/retail/interactive-tutorials/events/write-user-event.js
@@ -14,6 +14,7 @@
 
 'use strict';
 
+// [START retail_write_user_event]
 async function main() {
   // Imports the Google Cloud client library.
   const {UserEventServiceClient} = require('@google-cloud/retail').v2;
@@ -66,3 +67,4 @@ process.on('unhandledRejection', err => {
 });
 
 main();
+// [END retail_write_user_event]