diff --git a/Libraries/AppStateIOS/AppStateIOS.ios.js b/Libraries/AppStateIOS/AppStateIOS.ios.js
index f7dddcd57..d482b4e7d 100644
--- a/Libraries/AppStateIOS/AppStateIOS.ios.js
+++ b/Libraries/AppStateIOS/AppStateIOS.ios.js
@@ -11,7 +11,6 @@
  */
 'use strict';
 
-var Map = require('Map');
 var NativeModules = require('NativeModules');
 var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
 var RCTAppState = NativeModules.AppState;
diff --git a/Libraries/CustomComponents/Navigator/Navigator.js b/Libraries/CustomComponents/Navigator/Navigator.js
index b87532e58..df6940f3a 100644
--- a/Libraries/CustomComponents/Navigator/Navigator.js
+++ b/Libraries/CustomComponents/Navigator/Navigator.js
@@ -30,7 +30,6 @@
 var AnimationsDebugModule = require('NativeModules').AnimationsDebugModule;
 var Dimensions = require('Dimensions');
 var InteractionMixin = require('InteractionMixin');
-var Map = require('Map');
 var NavigationContext = require('NavigationContext');
 var NavigatorBreadcrumbNavigationBar = require('NavigatorBreadcrumbNavigationBar');
 var NavigatorNavigationBar = require('NavigatorNavigationBar');
diff --git a/Libraries/JavaScriptAppEngine/Initialization/InitializeJavaScriptAppEngine.js b/Libraries/JavaScriptAppEngine/Initialization/InitializeJavaScriptAppEngine.js
index 5f5f2e491..37f507c2e 100644
--- a/Libraries/JavaScriptAppEngine/Initialization/InitializeJavaScriptAppEngine.js
+++ b/Libraries/JavaScriptAppEngine/Initialization/InitializeJavaScriptAppEngine.js
@@ -150,11 +150,15 @@ function setUpGeolocation() {
   polyfillGlobal('geolocation', require('Geolocation'), GLOBAL.navigator);
 }
 
+function setUpMapAndSet() {
+  polyfillGlobal('Map', require('Map'));
+  polyfillGlobal('Set', require('Set'));
+}
+
 function setUpProduct() {
   Object.defineProperty(GLOBAL.navigator, 'product', {value: 'ReactNative'});
 }
 
-
 function setUpWebSockets() {
   polyfillGlobal('WebSocket', require('WebSocket'));
 }
@@ -198,6 +202,7 @@ setUpPromise();
 setUpErrorHandler();
 setUpXHR();
 setUpGeolocation();
+setUpMapAndSet();
 setUpProduct();
 setUpWebSockets();
 setUpProfile();
diff --git a/Libraries/LinkingIOS/LinkingIOS.js b/Libraries/LinkingIOS/LinkingIOS.js
index 1d186ccbf..a4832f268 100644
--- a/Libraries/LinkingIOS/LinkingIOS.js
+++ b/Libraries/LinkingIOS/LinkingIOS.js
@@ -13,7 +13,6 @@
 
 var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
 var RCTLinkingManager = require('NativeModules').LinkingManager;
-var Map = require('Map');
 var invariant = require('invariant');
 
 var _notifHandlers = new Map();
diff --git a/Libraries/PushNotificationIOS/PushNotificationIOS.js b/Libraries/PushNotificationIOS/PushNotificationIOS.js
index 4432f7ea1..cab4ba362 100644
--- a/Libraries/PushNotificationIOS/PushNotificationIOS.js
+++ b/Libraries/PushNotificationIOS/PushNotificationIOS.js
@@ -11,7 +11,6 @@
  */
 'use strict';
 
-var Map = require('Map');
 var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
 var RCTPushNotificationManager = require('NativeModules').PushNotificationManager;
 var invariant = require('invariant');
diff --git a/Libraries/ReactIOS/YellowBox.js b/Libraries/ReactIOS/YellowBox.js
index 762428ee2..692cd4f6e 100644
--- a/Libraries/ReactIOS/YellowBox.js
+++ b/Libraries/ReactIOS/YellowBox.js
@@ -14,7 +14,6 @@
 
 const EventEmitter = require('EventEmitter');
 import type EmitterSubscription from 'EmitterSubscription';
-const Map = require('Map');
 const Platform = require('Platform');
 const React = require('React');
 const StyleSheet = require('StyleSheet');
diff --git a/Libraries/Utilities/BackAndroid.android.js b/Libraries/Utilities/BackAndroid.android.js
index f828f2f7e..ed920e22c 100644
--- a/Libraries/Utilities/BackAndroid.android.js
+++ b/Libraries/Utilities/BackAndroid.android.js
@@ -11,7 +11,6 @@
 
 'use strict';
 
-var Set = require('Set');
 var DeviceEventManager = require('NativeModules').DeviceEventManager;
 var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');