diff --git a/local-cli/util/Config.js b/local-cli/util/Config.js
index 133a468d0..751ee957d 100644
--- a/local-cli/util/Config.js
+++ b/local-cli/util/Config.js
@@ -81,7 +81,7 @@ export type ConfigT = {
   /**
    * Returns the path to the worker that is used for transformation.
    */
-  getWorkerPath: () => string,
+  getWorkerPath: () => ?string,
 
   /**
    * An optional function that can modify the code and source map of bundle
@@ -135,7 +135,7 @@ const Config = {
     postProcessModules: modules => modules,
     postProcessModulesForBuck: modules => modules,
     transformVariants: () => ({default: {}}),
-    getWorkerPath: () => require.resolve('./worker.js'),
+    getWorkerPath: () => null,
   }: ConfigT),
 
   find(startDir: string): ConfigT {
diff --git a/local-cli/util/worker.js b/local-cli/util/worker.js
deleted file mode 100644
index 65b904afc..000000000
--- a/local-cli/util/worker.js
+++ /dev/null
@@ -1,13 +0,0 @@
-/**
- * Copyright (c) 2016-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-'use strict';
-
-require('../../setupBabel')();
-module.exports = require('metro-bundler/build/JSTransformer/worker');