diff --git a/packages/next/client/router.ts b/packages/next/client/router.ts
index 32da8433124f4..dcc6f20c7f646 100644
--- a/packages/next/client/router.ts
+++ b/packages/next/client/router.ts
@@ -45,6 +45,7 @@ const coreMethodFields = [
   'back',
   'prefetch',
   'beforePopState',
+  'addBasePath',
 ]
 
 // Events is a static property on the router, the router doesn't have to be initialized to use it
diff --git a/packages/next/next-server/lib/router/router.ts b/packages/next/next-server/lib/router/router.ts
index 96cde4b88ea9c..0a86d9e0c063f 100644
--- a/packages/next/next-server/lib/router/router.ts
+++ b/packages/next/next-server/lib/router/router.ts
@@ -169,6 +169,8 @@ export default class Router implements BaseRouter {
     }
   }
 
+  addBasePath = addBasePath
+
   onPopState = (e: PopStateEvent): void => {
     if (!e.state) {
       // We get state as undefined for two reasons.
diff --git a/packages/next/next-server/server/render.tsx b/packages/next/next-server/server/render.tsx
index aebb107c555c1..b6d5dfc2929bd 100644
--- a/packages/next/next-server/server/render.tsx
+++ b/packages/next/next-server/server/render.tsx
@@ -2,7 +2,7 @@ import { IncomingMessage, ServerResponse } from 'http'
 import { ParsedUrlQuery } from 'querystring'
 import React from 'react'
 import { renderToString, renderToStaticMarkup } from 'react-dom/server'
-import { NextRouter } from '../lib/router/router'
+import { NextRouter, addBasePath } from '../lib/router/router'
 import mitt, { MittEmitter } from '../lib/mitt'
 import {
   loadGetInitialProps,
@@ -52,6 +52,7 @@ class ServerRouter implements NextRouter {
   query: ParsedUrlQuery
   asPath: string
   events: any
+  addBasePath: typeof addBasePath
   // TODO: Remove in the next major version, as this would mean the user is adding event listeners in server-side `render` method
   static events: MittEmitter = mitt()
 
@@ -60,6 +61,7 @@ class ServerRouter implements NextRouter {
     this.pathname = pathname
     this.query = query
     this.asPath = as
+    this.addBasePath = addBasePath
   }
   push(): any {
     noRouter()