diff --git a/public/docs/_examples/toh-6/ts/app/hero.service.ts b/public/docs/_examples/toh-6/ts/app/hero.service.ts
index a2344d84e6..8abbcc2778 100644
--- a/public/docs/_examples/toh-6/ts/app/hero.service.ts
+++ b/public/docs/_examples/toh-6/ts/app/hero.service.ts
@@ -53,7 +53,7 @@ export class HeroService {
     let url = `${this.heroesUrl}/${hero.id}`;
 
     return this.http
-               .delete(url, headers)
+               .delete(url, {headers: headers})
                .toPromise()
                .catch(this.handleError);
   }