diff --git a/aio/content/examples/toh-pt6/src/app/hero.service.ts b/aio/content/examples/toh-pt6/src/app/hero.service.ts
index 6fd1607217..80d511c776 100644
--- a/aio/content/examples/toh-pt6/src/app/hero.service.ts
+++ b/aio/content/examples/toh-pt6/src/app/hero.service.ts
@@ -151,7 +151,7 @@ export class HeroService {
   // #docregion log
   /** Log a HeroService message with the MessageService */
   private log(message: string) {
-    this.messageService.add('HeroService: ' + message);
+    this.messageService.add(`HeroService: ${message}`);
   }
   // #enddocregion log
 }