diff --git a/Libraries/Promise.js b/Libraries/Promise.js
index 987b25611e44af..46238f5c67469b 100644
--- a/Libraries/Promise.js
+++ b/Libraries/Promise.js
@@ -11,11 +11,9 @@
 'use strict';
 
 const Promise = require('promise/setimmediate/es6-extensions');
-require('promise/setimmediate/done');
 
-Promise.prototype.finally = function(onSettled) {
-  return this.then(onSettled, onSettled);
-};
+require('promise/setimmediate/done');
+require('promise/setimmediate/finally');
 
 if (__DEV__) {
   require('promise/setimmediate/rejection-tracking').enable({