diff --git a/aio/content/guide/template-typecheck.md b/aio/content/guide/template-typecheck.md
index c9ce6a5d90..3891a8584f 100644
--- a/aio/content/guide/template-typecheck.md
+++ b/aio/content/guide/template-typecheck.md
@@ -228,6 +228,7 @@ Consider the following directive:
 class SubmitButton {
   private _disabled: boolean;
 
+  @Input()
   get disabled(): boolean {
     return this._disabled;
   }
@@ -269,6 +270,7 @@ As a workaround for this problem, Angular supports checking a wider, more permis
 class SubmitButton {
   private _disabled: boolean;
 
+  @Input()
   get disabled(): boolean {
     return this._disabled;
   }