diff --git a/packages/react-navigation/src/PlatformHelpers.native.js b/packages/react-navigation/src/PlatformHelpers.native.js
deleted file mode 100644
index 7c6ddb1a..00000000
--- a/packages/react-navigation/src/PlatformHelpers.native.js
+++ /dev/null
@@ -1,9 +0,0 @@
-import {
-  BackAndroid as DeprecatedBackAndroid,
-  BackHandler as ModernBackHandler,
-  MaskedViewIOS,
-} from 'react-native';
-
-const BackHandler = ModernBackHandler || DeprecatedBackAndroid;
-
-export { BackHandler, MaskedViewIOS };
diff --git a/packages/react-navigation/src/PlatformHelpers.web.js b/packages/react-navigation/src/PlatformHelpers.web.js
deleted file mode 100644
index e5546299..00000000
--- a/packages/react-navigation/src/PlatformHelpers.web.js
+++ /dev/null
@@ -1,6 +0,0 @@
-import React from 'react';
-import { BackHandler, View } from 'react-native';
-
-const MaskedViewIOS = () => <View>{this.props.children}</View>;
-
-export { BackHandler, MaskedViewIOS };
diff --git a/packages/react-navigation/src/createNavigationContainer.js b/packages/react-navigation/src/createNavigationContainer.js
index a25bf499..ac5e8ecb 100644
--- a/packages/react-navigation/src/createNavigationContainer.js
+++ b/packages/react-navigation/src/createNavigationContainer.js
@@ -1,8 +1,7 @@
 import React from 'react';
-import { AsyncStorage, Linking, Platform } from 'react-native';
+import { AsyncStorage, Linking, Platform, BackHandler } from 'react-native';
 import { polyfill } from 'react-lifecycles-compat';
 
-import { BackHandler } from './PlatformHelpers';
 import NavigationActions from './NavigationActions';
 import getNavigation from './getNavigation';
 import invariant from './utils/invariant';
diff --git a/packages/react-navigation/src/views/Header/Header.js b/packages/react-navigation/src/views/Header/Header.js
index d129264f..d097eaae 100644
--- a/packages/react-navigation/src/views/Header/Header.js
+++ b/packages/react-navigation/src/views/Header/Header.js
@@ -9,8 +9,8 @@ import {
   View,
   I18nManager,
   ViewPropTypes,
+  MaskedViewIOS,
 } from 'react-native';
-import { MaskedViewIOS } from '../../PlatformHelpers';
 import SafeAreaView from 'react-native-safe-area-view';
 
 import HeaderTitle from './HeaderTitle';