diff --git a/gulp/util/bundle.js b/gulp/util/bundle.js
index 7c5de51..17ea220 100644
--- a/gulp/util/bundle.js
+++ b/gulp/util/bundle.js
@@ -49,6 +49,8 @@
         bundle.ignore('./' + exclude[i]);
     }
 
+    bundle.add('./src/polyfill/requestAnimationFrame.js');
+
     bundle.require(paths.jsEntry, { expose: 'pixi.js' });
 
     return bundle;

diff --git a/gulp/util/bundle.js b/gulp/util/bundle.js
index 7c5de51..17ea220 100644
--- a/gulp/util/bundle.js
+++ b/gulp/util/bundle.js
@@ -49,6 +49,8 @@
         bundle.ignore('./' + exclude[i]);
     }
 
+    bundle.add('./src/polyfill/requestAnimationFrame.js');
+
     bundle.require(paths.jsEntry, { expose: 'pixi.js' });
 
     return bundle;
diff --git a/src/core/utils/index.js b/src/core/utils/index.js
index 5008c8e..69ab4e2 100644
--- a/src/core/utils/index.js
+++ b/src/core/utils/index.js
@@ -7,7 +7,6 @@
     _uid: 0,
     _saidHello: false,
 
-    RAFramePolyfill:require('./requestAnimationFramePolyfill'),
     EventData:      require('./EventData'),
     eventTarget:    require('./eventTarget'),
     pluginTarget:   require('./pluginTarget'),

diff --git a/gulp/util/bundle.js b/gulp/util/bundle.js
index 7c5de51..17ea220 100644
--- a/gulp/util/bundle.js
+++ b/gulp/util/bundle.js
@@ -49,6 +49,8 @@
         bundle.ignore('./' + exclude[i]);
     }
 
+    bundle.add('./src/polyfill/requestAnimationFrame.js');
+
     bundle.require(paths.jsEntry, { expose: 'pixi.js' });
 
     return bundle;
diff --git a/src/core/utils/index.js b/src/core/utils/index.js
index 5008c8e..69ab4e2 100644
--- a/src/core/utils/index.js
+++ b/src/core/utils/index.js
@@ -7,7 +7,6 @@
     _uid: 0,
     _saidHello: false,
 
-    RAFramePolyfill:require('./requestAnimationFramePolyfill'),
     EventData:      require('./EventData'),
     eventTarget:    require('./eventTarget'),
     pluginTarget:   require('./pluginTarget'),
diff --git a/src/core/utils/requestAnimationFramePolyfill.js b/src/core/utils/requestAnimationFramePolyfill.js
deleted file mode 100644
index 3e14a07..0000000
--- a/src/core/utils/requestAnimationFramePolyfill.js
+++ /dev/null
@@ -1,27 +0,0 @@
-(function(window) {
-    var lastTime = 0;
-    var vendors = ['ms', 'moz', 'webkit', 'o'];
-    for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
-        window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
-        window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] ||
-            window[vendors[x] + 'CancelRequestAnimationFrame'];
-    }
-
-    if (!window.requestAnimationFrame) {
-        window.requestAnimationFrame = function(callback) {
-            var currTime = new Date().getTime();
-            var timeToCall = Math.max(0, 16 - (currTime - lastTime));
-            var id = window.setTimeout(function() { callback(currTime + timeToCall); },
-              timeToCall);
-            lastTime = currTime + timeToCall;
-            return id;
-        };
-    }
-
-    if (!window.cancelAnimationFrame) {
-        window.cancelAnimationFrame = function(id) {
-            clearTimeout(id);
-        };
-    }
-
-    })(window);

diff --git a/gulp/util/bundle.js b/gulp/util/bundle.js
index 7c5de51..17ea220 100644
--- a/gulp/util/bundle.js
+++ b/gulp/util/bundle.js
@@ -49,6 +49,8 @@
         bundle.ignore('./' + exclude[i]);
     }
 
+    bundle.add('./src/polyfill/requestAnimationFrame.js');
+
     bundle.require(paths.jsEntry, { expose: 'pixi.js' });
 
     return bundle;
diff --git a/src/core/utils/index.js b/src/core/utils/index.js
index 5008c8e..69ab4e2 100644
--- a/src/core/utils/index.js
+++ b/src/core/utils/index.js
@@ -7,7 +7,6 @@
     _uid: 0,
     _saidHello: false,
 
-    RAFramePolyfill:require('./requestAnimationFramePolyfill'),
     EventData:      require('./EventData'),
     eventTarget:    require('./eventTarget'),
     pluginTarget:   require('./pluginTarget'),
diff --git a/src/core/utils/requestAnimationFramePolyfill.js b/src/core/utils/requestAnimationFramePolyfill.js
deleted file mode 100644
index 3e14a07..0000000
--- a/src/core/utils/requestAnimationFramePolyfill.js
+++ /dev/null
@@ -1,27 +0,0 @@
-(function(window) {
-    var lastTime = 0;
-    var vendors = ['ms', 'moz', 'webkit', 'o'];
-    for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
-        window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
-        window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] ||
-            window[vendors[x] + 'CancelRequestAnimationFrame'];
-    }
-
-    if (!window.requestAnimationFrame) {
-        window.requestAnimationFrame = function(callback) {
-            var currTime = new Date().getTime();
-            var timeToCall = Math.max(0, 16 - (currTime - lastTime));
-            var id = window.setTimeout(function() { callback(currTime + timeToCall); },
-              timeToCall);
-            lastTime = currTime + timeToCall;
-            return id;
-        };
-    }
-
-    if (!window.cancelAnimationFrame) {
-        window.cancelAnimationFrame = function(id) {
-            clearTimeout(id);
-        };
-    }
-
-    })(window);
diff --git a/src/polyfill/requestAnimationFrame.js b/src/polyfill/requestAnimationFrame.js
new file mode 100644
index 0000000..1ce9076
--- /dev/null
+++ b/src/polyfill/requestAnimationFrame.js
@@ -0,0 +1,66 @@
+// References:
+// https://github.com/Financial-Times/polyfill-service/tree/master/polyfills/requestAnimationFrame
+// https://gist.github.com/timhall/4078614
+// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
+// https://gist.github.com/1579671
+// http://updates.html5rocks.com/2012/05/requestAnimationFrame-API-now-with-sub-millisecond-precision
+
+// Expected to be used with Browserfiy
+// Browserify automatically detects the use of `global` and passes the
+// correct reference of `global`, `self`, and finally `window`
+
+// Date.now
+if (!(Date.now && Date.prototype.getTime)) {
+    Date.now = function now() {
+        return new Date().getTime();
+    };
+}
+
+// performance.now
+if (!(global.performance && global.performance.now)) {
+    var startTime = Date.now();
+    if (!global.performance) {
+        global.performance = {};
+    }
+    global.performance.now = function () {
+        return Date.now() - startTime;
+    };
+}
+
+// requestAnimationFrame
+var lastTime = Date.now();
+var vendors = ['ms', 'moz', 'webkit', 'o'];
+
+for(var x = 0; x < vendors.length && !global.requestAnimationFrame; ++x) {
+    global.requestAnimationFrame = global[vendors[x] + 'RequestAnimationFrame'];
+    global.cancelAnimationFrame = global[vendors[x] + 'CancelAnimationFrame'] ||
+        global[vendors[x] + 'CancelRequestAnimationFrame'];
+}
+
+if (!global.requestAnimationFrame) {
+    global.requestAnimationFrame = function (callback) {
+        if (typeof callback !== 'function') {
+            throw new TypeError(callback + 'is not a function');
+        }
+
+        var currentTime = Date.now(),
+            delay = 16 + lastTime - currentTime;
+
+        if (delay < 0) {
+            delay = 0;
+        }
+
+        lastTime = currentTime;
+
+        return setTimeout(function () {
+            lastTime = Date.now();
+            callback(performance.now());
+        }, delay);
+    };
+}
+
+if (!global.cancelAnimationFrame) {
+    global.cancelAnimationFrame = function(id) {
+        clearTimeout(id);
+    };
+}