diff --git a/src/Reducer.js b/src/Reducer.js
index 8d16bf490..619326a6f 100644
--- a/src/Reducer.js
+++ b/src/Reducer.js
@@ -9,7 +9,6 @@
 
 /* eslint-disable no-param-reassign */
 
-import { Platform } from 'react-native';
 import * as ActionConst from './ActionConst';
 import { ActionMap } from './Actions';
 import { assert } from './Util';
@@ -118,10 +117,6 @@ function inject(state, action, props, scenes) {
       };
     }
     case ActionConst.ANDROID_BACK: {
-      if (Platform.OS === 'android') {
-        assert(state.index > 0, 'You are already in the root scene.');
-      }
-
       return {
         ...state,
         index: state.index - 1,