diff --git a/gulp/util/bundle.js b/gulp/util/bundle.js
index 17ea220..7c5de51 100644
--- a/gulp/util/bundle.js
+++ b/gulp/util/bundle.js
@@ -49,8 +49,6 @@
         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 17ea220..7c5de51 100644
--- a/gulp/util/bundle.js
+++ b/gulp/util/bundle.js
@@ -49,8 +49,6 @@
         bundle.ignore('./' + exclude[i]);
     }
 
-    bundle.add('./src/polyfill/requestAnimationFrame.js');
-
     bundle.require(paths.jsEntry, { expose: 'pixi.js' });
 
     return bundle;
diff --git a/src/index.js b/src/index.js
index 1ba15c8..c597c78 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,3 +1,5 @@
+require('./polyfill/requestAnimationFrame')
+
 var core = require('./core');
 
 extendCore(require('./core/math'));