diff --git a/setup/web_server_configuration.rst b/setup/web_server_configuration.rst
index 32775918bb9..b7dc2e9b373 100644
--- a/setup/web_server_configuration.rst
+++ b/setup/web_server_configuration.rst
@@ -75,6 +75,8 @@ and increase web server performance:
         ServerAlias www.domain.tld
 
         DocumentRoot /var/www/project/web
+        DirectoryIndex /app.php
+
         <Directory /var/www/project/web>
             AllowOverride None
             Order Allow,Deny