diff --git a/packages/config/types/index.d.ts b/packages/config/types/index.d.ts
index 4649988ff9..021775e726 100644
--- a/packages/config/types/index.d.ts
+++ b/packages/config/types/index.d.ts
@@ -9,7 +9,7 @@ import { NuxtConfigurationLoading, NuxtConfigurationLoadingIndicator } from './l
 import { NuxtConfigurationModule } from './module'
 import { NuxtConfigurationPlugin } from './plugin'
 import { NuxtConfigurationRender } from './render'
-import { NuxtConfigurationRouter } from './router'
+import { NuxtConfigurationRouter, NuxtRouteConfig } from './router'
 import { NuxtConfigurationServer } from './server'
 import { NuxtConfigurationServerMiddleware } from './server-middleware'
 import { NuxtConfigurationVueConfiguration } from './vue-configuration'
@@ -65,6 +65,7 @@ export {
   NuxtConfigurationPlugin as Plugin,
   NuxtConfigurationRender as Render,
   NuxtConfigurationRouter as Router,
+  NuxtRouteConfig as RouteConfig,
   NuxtConfigurationServer as Server,
   NuxtConfigurationServerMiddleware as ServerMiddleware,
   NuxtConfigurationVueConfiguration as VueConfiguration,
diff --git a/packages/config/types/router.d.ts b/packages/config/types/router.d.ts
index e7f2e65d6f..d57fe257f4 100644
--- a/packages/config/types/router.d.ts
+++ b/packages/config/types/router.d.ts
@@ -5,11 +5,15 @@
  *                https://router.vuejs.org/api/#router-construction-options
  */
 
-import { RouterOptions, Route } from 'vue-router'
+import { RouterOptions, RouteConfig } from 'vue-router'
+
+export interface NuxtRouteConfig extends RouteConfig {
+  chunkNames: { [key: string]: string }
+}
 
 export interface NuxtConfigurationRouter extends RouterOptions {
   routeNameSplitter?: string
-  extendRoutes?: (routes: Route[], resolve: (...pathSegments: string[]) => string) => void
+  extendRoutes?(routes: NuxtRouteConfig[], resolve: (...pathSegments: string[]) => string): void
   linkPrefetchedClass?: string
   middleware?: string | string[]
   prefetchLinks?: boolean