diff --git a/grunt/tasks/browserify.js b/grunt/tasks/browserify.js
index d43c0841f8..c83ed7e65c 100644
--- a/grunt/tasks/browserify.js
+++ b/grunt/tasks/browserify.js
@@ -46,7 +46,7 @@ module.exports = function() {
   };
 
   // TODO: make sure this works, test with this too
-  config.transforms.forEach(bundle.transform, this);
+  config.transforms.forEach(bundle.transform, bundle);
 
   // Actually bundle it up
   var _this = this;