diff --git a/lib/link.js b/lib/link.js
index eca2e798b1670d6c516a84aea17fbe48d32ba532..873fe936e34c1acdb4df3b4e822d1998224c9ffb 100644
--- a/lib/link.js
+++ b/lib/link.js
@@ -1,7 +1,7 @@
 import { resolve } from 'url'
 import React, { Component, Children, PropTypes } from 'react'
 import Router from './router'
-import { warn, execOnce } from './utils'
+import { warn, execOnce, getLocationOrigin } from './utils'
 
 export default class Link extends Component {
   constructor (props) {
@@ -84,7 +84,7 @@ export default class Link extends Component {
 }
 
 export function isLocal (href) {
-  const origin = window.location.origin
+  const origin = getLocationOrigin()
   return !/^(https?:)?\/\//.test(href) ||
     origin === href.substr(0, origin.length)
 }
diff --git a/lib/router/router.js b/lib/router/router.js
index 9f16572378133ab6c521b266dc27210025308963..dc1cd919e53064e48b390e39e73b869dc51786b4 100644
--- a/lib/router/router.js
+++ b/lib/router/router.js
@@ -5,7 +5,7 @@ import evalScript from '../eval-script'
 import shallowEquals from '../shallow-equals'
 import { EventEmitter } from 'events'
 import { reloadIfPrefetched } from '../prefetch'
-import { loadGetInitialProps } from '../utils'
+import { loadGetInitialProps, getLocationOrigin } from '../utils'
 
 export default class Router extends EventEmitter {
   constructor (pathname, query, { Component, ErrorComponent, err } = {}) {
@@ -283,7 +283,8 @@ export default class Router extends EventEmitter {
 }
 
 function getURL () {
-  const { href, origin } = window.location
+  const { href } = window.location
+  const origin = getLocationOrigin()
   return href.substring(origin.length)
 }
 
diff --git a/lib/utils.js b/lib/utils.js
index b1757f98784963af1910515701d5e485b6d126b5..d5ba6c5f301b2b17b3cfa8ff7ecde6ee9d1129ad 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -53,3 +53,8 @@ export async function loadGetInitialProps (Component, ctx) {
   }
   return props
 }
+
+export function getLocationOrigin () {
+  const { protocol, hostname, port } = window.location
+  return `${protocol}//${hostname}${port ? ':' + port : ''}`
+}