diff --git a/packages/react-navigation/docs/api/routers/Routers.md b/packages/react-navigation/docs/api/routers/Routers.md
index 89f44811..accc5bb6 100644
--- a/packages/react-navigation/docs/api/routers/Routers.md
+++ b/packages/react-navigation/docs/api/routers/Routers.md
@@ -65,6 +65,8 @@ MyApp.router.getStateForAction = (action, state) => {
 Sometimes you may want to prevent some navigation activity, depending on your route.
 
 ```js
+import { NavigationActions } from 'react-navigation'
+
 const MyStackRouter = StackRouter({
   Home: { screen: HomeScreen },
   Profile: { screen: ProfileScreen },