diff --git a/docs/installation_guide/advanced.md b/docs/installation_guide/advanced.md
index 060897804..677ea47bc 100644
--- a/docs/installation_guide/advanced.md
+++ b/docs/installation_guide/advanced.md
@@ -402,7 +402,7 @@ server {
   }
 
   location @fileserver {
-    proxy_pass http://localhost:8080/;
+    proxy_pass http://localhost:8080;
     proxy_set_header Host $host;
     proxy_set_header Upgrade $http_upgrade;
     proxy_set_header Connection "upgrade";