diff --git a/packages/examples/upgrade/static/ts/full/module.ts b/packages/examples/upgrade/static/ts/full/module.ts
index 61da6b8a22..1e7c155dbf 100644
--- a/packages/examples/upgrade/static/ts/full/module.ts
+++ b/packages/examples/upgrade/static/ts/full/module.ts
@@ -39,7 +39,6 @@ class TextFormatter {
              <button (click)="addHero.emit()">Add Hero</button>`,
 })
 class Ng2HeroesComponent {
-  // TODO(issue/24571): remove '!'.
   @Input() heroes !: Hero[];
   @Output() addHero = new EventEmitter();
   @Output() removeHero = new EventEmitter();
@@ -78,9 +77,7 @@ class HeroesService {
 class Ng1HeroComponentWrapper extends UpgradeComponent {
   // The names of the input and output properties here must match the names of the
   // `<` and `&` bindings in the AngularJS component that is being wrapped
-  // TODO(issue/24571): remove '!'.
   @Input() hero !: Hero;
-  // TODO(issue/24571): remove '!'.
   @Output() onRemove !: EventEmitter<void>;
 
   constructor(elementRef: ElementRef, injector: Injector) {
diff --git a/packages/examples/upgrade/static/ts/lite/module.ts b/packages/examples/upgrade/static/ts/lite/module.ts
index 1a21702714..0a2e9b95f5 100644
--- a/packages/examples/upgrade/static/ts/lite/module.ts
+++ b/packages/examples/upgrade/static/ts/lite/module.ts
@@ -104,8 +104,8 @@ class Ng2HeroesComponent {
 class Ng1HeroComponentWrapper extends UpgradeComponent {
   // The names of the input and output properties here must match the names of the
   // `<` and `&` bindings in the AngularJS component that is being wrapped.
-  @Input() hero: Hero;
-  @Output() onRemove: EventEmitter<void>;
+  @Input() hero !: Hero;
+  @Output() onRemove !: EventEmitter<void>;
 
   constructor(elementRef: ElementRef, injector: Injector) {
     // We must pass the name of the directive as used by AngularJS to the super.