diff --git a/apps/angular/1-projection/src/app/data-access/fake-http.service.ts b/apps/angular/1-projection/src/app/data-access/fake-http.service.ts
index 82a8f1813..f304ce2af 100644
--- a/apps/angular/1-projection/src/app/data-access/fake-http.service.ts
+++ b/apps/angular/1-projection/src/app/data-access/fake-http.service.ts
@@ -16,7 +16,7 @@ import { Teacher, subject } from '../model/teacher.model';
 
 const factoryTeacher = incrementalNumber();
 
-export const randTeacher = () => ({
+export const randTeacher = (): Teacher => ({
   id: factoryTeacher(),
   firstName: randFirstName(),
   lastName: randLastName(),