diff --git a/settings/settings.php b/settings/settings.php
index fc3166b4..b7e9e52c 100644
--- a/settings/settings.php
+++ b/settings/settings.php
@@ -4,7 +4,7 @@
 
 	// General settings
 	@define('CONST_Debug', false);
-	@define('CONST_Database_DSN', 'pgsql://@/nominatim');
+	@define('CONST_Database_DSN', 'pgsql://@/nominatim'); // <driver>://<username>:<password>@<host>:<port>/<database>
 	@define('CONST_Max_Word_Frequency', '50000');
 
 	// Software versions