diff --git a/modules/@angular/core/src/application_ref.ts b/modules/@angular/core/src/application_ref.ts
index c23ed73f21..5ada6bcaed 100644
--- a/modules/@angular/core/src/application_ref.ts
+++ b/modules/@angular/core/src/application_ref.ts
@@ -1,5 +1,5 @@
 import {NgZone, NgZoneError} from './zone/ng_zone';
-import {Type, isBlank, isPresent, assertionsEnabled, lockMode, isPromise} from '../src/facade/lang';
+import {Type, isBlank, isPresent, assertionsEnabled, lockMode, isPromise, IS_DART} from '../src/facade/lang';
 import {Injector, Injectable} from './di';
 import {PLATFORM_INITIALIZER, APP_INITIALIZER} from './application_tokens';
 import {PromiseWrapper, ObservableWrapper} from '../src/facade/async';
@@ -361,8 +361,9 @@ export class ApplicationRef_ extends ApplicationRef {
       this._loadComponent(compRef);
       let c: Console = this._injector.get(Console);
       if (assertionsEnabled()) {
-        c.log(
-            "Angular 2 is running in the development mode. Call enableProdMode() to enable the production mode.");
+        let prodDescription = IS_DART ? "Production mode is disabled in Dart." :
+                                        "Call enableProdMode() to enable the production mode.";
+        c.log(`Angular 2 is running in the development mode. ${prodDescription}`);
       }
       return compRef;
     });