diff --git a/aio/content/examples/toh-pt2/src/app/heroes/heroes.component.ts b/aio/content/examples/toh-pt2/src/app/heroes/heroes.component.ts
index d3b0c870fa..df0cff66b8 100644
--- a/aio/content/examples/toh-pt2/src/app/heroes/heroes.component.ts
+++ b/aio/content/examples/toh-pt2/src/app/heroes/heroes.component.ts
@@ -19,7 +19,7 @@ export class HeroesComponent implements OnInit {
   heroes = HEROES;
   // #enddocregion component
   // #docregion on-select
-  selectedHero: Hero;
+  selectedHero?: Hero;
  // #enddocregion on-select
 
   constructor() { }
@@ -35,4 +35,3 @@ export class HeroesComponent implements OnInit {
 // #docregion component
 }
 // #enddocregion component
-