diff --git a/packages/@vuepress/plugin-google-analytics/README.md b/packages/@vuepress/plugin-google-analytics/README.md
index be05a08e8b..f1fb6a5a16 100644
--- a/packages/@vuepress/plugin-google-analytics/README.md
+++ b/packages/@vuepress/plugin-google-analytics/README.md
@@ -7,6 +7,6 @@
 ### ga
 
 - Type: `string`
-- Default: `/i18n/`
+- Default: `undefined`
 
 Provide the Google Analytics ID to enable integration.
diff --git a/packages/@vuepress/plugin-google-analytics/inject.js b/packages/@vuepress/plugin-google-analytics/inject.js
index a2e1be9de4..4427927982 100644
--- a/packages/@vuepress/plugin-google-analytics/inject.js
+++ b/packages/@vuepress/plugin-google-analytics/inject.js
@@ -2,7 +2,7 @@
 
 export default ({ router }) => {
 // Google analytics integration
-  if (process.env.NODE_ENV === 'production' && GA_ID) {
+  if (process.env.NODE_ENV === 'production' && GA_ID && typeof window !== 'undefined') {
     (function (i, s, o, g, r, a, m) {
       i['GoogleAnalyticsObject'] = r
       i[r] = i[r] || function () {