diff --git a/declarations.d.ts b/declarations.d.ts
index 00eef4ad2..a97d8e50a 100644
--- a/declarations.d.ts
+++ b/declarations.d.ts
@@ -146,6 +146,10 @@ declare function setInterval(callback: Function, milliseconds?: number): number;
  */
 declare function clearInterval(id: number): void;
 
+//@private
+declare function zonedCallback(callback: Function): Function;
+//@endprivate
+
 declare class WeakRef<T> {
     constructor(obj: T);
     get(): T;
diff --git a/globals/globals.ts b/globals/globals.ts
index a166615e2..4fea68af0 100644
--- a/globals/globals.ts
+++ b/globals/globals.ts
@@ -29,6 +29,14 @@ global.loadModule = function(name: string): any {
     }
 }
 
+global.zonedCallback = function(callback: Function): Function {
+    if (global.zone) {
+        return global.zone.bind(callback);
+    } else {
+        return callback;
+    }
+}
+
 global.registerModule("timer", () => require("timer"));
 global.registerModule("ui/dialogs", () => require("ui/dialogs"));
 global.registerModule("xhr", () => require("xhr"));
diff --git a/timer/timer.android.ts b/timer/timer.android.ts
index 8b2dc7d3d..5e362d083 100644
--- a/timer/timer.android.ts
+++ b/timer/timer.android.ts
@@ -15,11 +15,12 @@ function createHandlerAndGetId(): number {
 }
 
 export function setTimeout(callback: Function, milliseconds = 0): number {
-    var id = createHandlerAndGetId();
+    const id = createHandlerAndGetId();
+    const zoneBound = zonedCallback(callback);
 
     var runnable = new java.lang.Runnable({
         run: () => {
-            callback();
+            zoneBound();
 
             if (timeoutCallbacks[id]) {
                 delete timeoutCallbacks[id];
@@ -44,12 +45,13 @@ export function clearTimeout(id: number): void {
 }
 
 export function setInterval(callback: Function, milliseconds = 0): number {
-    var id = createHandlerAndGetId();
-    var handler = timeoutHandler;
+    const id = createHandlerAndGetId();
+    const handler = timeoutHandler;
+    const zoneBound = zonedCallback(callback);
 
     var runnable = new java.lang.Runnable({
         run: () => {
-            callback();
+            zoneBound();
             if (timeoutCallbacks[id]) {
                 handler.postDelayed(runnable, long(milliseconds));
             }
diff --git a/timer/timer.ios.ts b/timer/timer.ios.ts
index aadd91b32..d97d4fc04 100644
--- a/timer/timer.ios.ts
+++ b/timer/timer.ios.ts
@@ -40,7 +40,7 @@ function createTimerAndGetId(callback: Function, milliseconds: number, shouldRep
 }
 
 export function setTimeout(callback: Function, milliseconds = 0): number {
-    return createTimerAndGetId(callback, milliseconds, false);
+    return createTimerAndGetId(zonedCallback(callback), milliseconds, false);
 }
 
 export function clearTimeout(id: number): void {
@@ -51,7 +51,7 @@ export function clearTimeout(id: number): void {
 }
 
 export function setInterval(callback: Function, milliseconds = 0): number {
-    return createTimerAndGetId(callback, milliseconds, true);
+    return createTimerAndGetId(zonedCallback(callback), milliseconds, true);
 }
 
 export var clearInterval = clearTimeout;