diff --git a/ionic/config/bootstrap.ts b/ionic/config/bootstrap.ts
index d202c9d98a..574bdef1c1 100644
--- a/ionic/config/bootstrap.ts
+++ b/ionic/config/bootstrap.ts
@@ -69,9 +69,9 @@ export function ionicProviders(args: any = {}) {
 export function postBootstrap(appRef: ComponentRef, prodMode: boolean) {
   appRef.injector.get(TapClick);
   let app: IonicApp = appRef.injector.get(IonicApp);
-  let platform = appRef.injector.get(Platform);
-  let zone = appRef.injector.get(NgZone);
-  platform.prepareReady(zone);
+  let platform: Platform = appRef.injector.get(Platform);
+  platform.setZone(appRef.injector.get(NgZone));
+  platform.prepareReady();
   app.setProd(prodMode);
 }
 
diff --git a/ionic/platform/platform.ts b/ionic/platform/platform.ts
index 8a64fc308b..119bae2fcd 100644
--- a/ionic/platform/platform.ts
+++ b/ionic/platform/platform.ts
@@ -48,6 +48,13 @@ export class Platform {
     this._readyPromise = new Promise(res => { this._readyResolve = res; } );
   }
 
+  /**
+   * @private
+   */
+  setZone(zone: NgZone) {
+    this._zone = zone;
+  }
+
 
   // Methods
   // **********************************************
@@ -207,11 +214,10 @@ export class Platform {
   /**
    * @private
    */
-  prepareReady(zone: NgZone) {
+  prepareReady() {
     // this is the default prepareReady if it's not replaced by the engine
     // if there was no custom ready method from the engine
     // then use the default DOM ready
-    this._zone = zone;
     ready(this.triggerReady.bind(this));
   }
 
diff --git a/ionic/platform/registry.ts b/ionic/platform/registry.ts
index f4d0a56c3c..ab6b7e6e83 100644
--- a/ionic/platform/registry.ts
+++ b/ionic/platform/registry.ts
@@ -106,7 +106,7 @@ Platform.register({
     swipeBackEnabled: isIOSDevice,
     swipeBackThreshold: 40,
     tapPolyfill: isIOSDevice,
-    virtualScrollEventAssist: !(window.indexedDB)
+    virtualScrollEventAssist: !(win.indexedDB)
   },
   isMatch(p: Platform): boolean {
     return p.isPlatformMatch('ios', ['iphone', 'ipad', 'ipod'], ['windows phone']);
@@ -172,7 +172,7 @@ Platform.register({
       // 1) ionic bootstrapped
       windowLoad(function() {
         // 2) window onload triggered or completed
-        doc.addEventListener('deviceready', () => {
+        doc.addEventListener('deviceready', function() {
           // 3) cordova deviceready event triggered
 
           // add cordova listeners to fire platform events