diff --git a/src/browser/ui/ReactMount.js b/src/browser/ui/ReactMount.js
index c4fe6280fe..78457fcb52 100644
--- a/src/browser/ui/ReactMount.js
+++ b/src/browser/ui/ReactMount.js
@@ -27,7 +27,6 @@ var ReactUpdates = require('ReactUpdates');
 
 var emptyObject = require('emptyObject');
 var containsNode = require('containsNode');
-var getReactRootElementInContainer = require('getReactRootElementInContainer');
 var instantiateReactComponent = require('instantiateReactComponent');
 var invariant = require('invariant');
 var setInnerHTML = require('setInnerHTML');
@@ -73,6 +72,23 @@ function firstDifferenceIndex(string1, string2) {
   return string1.length === string2.length ? -1 : minLen;
 }
 
+/**
+ * @param {DOMElement|DOMDocument} container DOM element that may contain
+ * a React component
+ * @return {?*} DOM element that may have the reactRoot ID, or null.
+ */
+function getReactRootElementInContainer(container) {
+  if (!container) {
+    return null;
+  }
+
+  if (container.nodeType === DOC_NODE_TYPE) {
+    return container.documentElement;
+  } else {
+    return container.firstChild;
+  }
+}
+
 /**
  * @param {DOMElement} container DOM element that may contain a React component.
  * @return {?string} A "reactRoot" ID, if a React component is rendered.
diff --git a/src/browser/ui/getReactRootElementInContainer.js b/src/browser/ui/getReactRootElementInContainer.js
deleted file mode 100644
index 4b8e7dfb65..0000000000
--- a/src/browser/ui/getReactRootElementInContainer.js
+++ /dev/null
@@ -1,33 +0,0 @@
-/**
- * Copyright 2013-2015, 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.
- *
- * @providesModule getReactRootElementInContainer
- */
-
-'use strict';
-
-var DOC_NODE_TYPE = 9;
-
-/**
- * @param {DOMElement|DOMDocument} container DOM element that may contain
- *                                           a React component
- * @return {?*} DOM element that may have the reactRoot ID, or null.
- */
-function getReactRootElementInContainer(container) {
-  if (!container) {
-    return null;
-  }
-
-  if (container.nodeType === DOC_NODE_TYPE) {
-    return container.documentElement;
-  } else {
-    return container.firstChild;
-  }
-}
-
-module.exports = getReactRootElementInContainer;