diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9783fd..0977e2c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,13 @@
 
 ### Fixed
 
+## 2016-08-01 chapter-9.4.1 (012-papilusion)
+
+### Added
+
+Chapter 9 : Dependancy injection
+ * 9.4 : Other provider (syntax 1)
+
 ## 2016-08-01 chapter-9.3 (011-chrysacier)
 
 ### Added
diff --git a/bootstrap.ts b/bootstrap.ts
index f32464d..65c8267 100644
--- a/bootstrap.ts
+++ b/bootstrap.ts
@@ -1,25 +1,25 @@
 import {bootstrap} from '@angular/platform-browser-dynamic';
 import {PonyRacerAppComponent} from './ponyracer-app.component';
-import {HTTP_PROVIDERS} from '@angular/http';
+import {HTTP_PROVIDERS, Http} from '@angular/http';
 import {RaceService} from './race.service';
 import {FakeRaceService} from './fake.race.service';
 
 function playWithInjector(inj) {
-    console.log(inj.get(RaceService));
+    console.log("inj.get(RaceService)", inj.get(RaceService));
 // logs "RaceService {http: Http}"
-    console.log(inj.get('RaceServiceToken'));
-// logs "RaceService {http: Http}" again
-    console.log(inj.get(RaceService) === inj.get(RaceService));
+    console.log("inj.get(RaceService) === inj.get(RaceService)", inj.get(RaceService) === inj.get(RaceService));
 // logs "true", as the same instance is returned every time for a token
-    console.log(inj.get(RaceService) === inj.get('RaceServiceToken'));
-// logs "false", as the providers are different,
-// so there are two distinct instances
 }
 
+const IS_PROD = false;
+
 bootstrap(PonyRacerAppComponent, [
     HTTP_PROVIDERS,
-    { provide: RaceService, useClass: FakeRaceService }
+    { provide: RaceService,
+      useFactory: () => IS_PROD ? new RaceService(null) : new FakeRaceService(),
+      // array with the dependencies needed (for RceService here)
+      deps: [Http]
+    }
 ]).then(
-    // and play with the returned injector
     appRef => playWithInjector(appRef.injector)
 ).catch(err => console.error(err)); // useful to catch the errors