diff --git a/lib/server/sitemap.js b/lib/server/sitemap.js
index fb0d891ad4..1ae41a5fd5 100644
--- a/lib/server/sitemap.js
+++ b/lib/server/sitemap.js
@@ -83,7 +83,7 @@ module.exports = function(callback) {
     });
 
   const sm = sitemap.createSitemap({
-    hostname: siteConfig.url,
+    hostname: siteConfig.url + siteConfig.baseUrl,
     cacheTime: 600 * 1000, // 600 sec - cache purge period
     urls,
   });