diff --git a/config.php.default b/config.php.default
index 889655423d..a5080f6e8c 100755
--- a/config.php.default
+++ b/config.php.default
@@ -14,7 +14,8 @@ $config['html_dir']	= $config['install_dir'] . "/html";
 $config['rrd_dir'] 	= $config['install_dir'] . "/rrd";
 $config['log_file']     = $config['install_dir'] . "/observium.log";
 
-###
+### Thie should *only* be set if you want to *force* a particular hostname/port
+### It will prevent the web interface being usable form any other hostname
 #$config['base_url']	= "http://observium.company.com";
 
 ### Enable the below to use rrdcached. be sure rrd_dir is within the rrdcached dir