diff --git a/Rocksolid_Light/rslight/rslight.inc.php b/Rocksolid_Light/rslight/rslight.inc.php
index 62d8a53..499d6b9 100644
--- a/Rocksolid_Light/rslight/rslight.inc.php
+++ b/Rocksolid_Light/rslight/rslight.inc.php
@@ -14,6 +14,7 @@ return [
   'enable_all_networks' => '1',
   'server_auth_user' => 'localuser',
   'server_auth_pass' => '<local_password>',
+  'site_shortname' => '',
   'rslight_title' => 'New Rocksolid Light Install',
   'title_full' => 'rslight',
   'hide_email' => '1',
diff --git a/Rocksolid_Light/rslight/scripts/setuphelper.php b/Rocksolid_Light/rslight/scripts/setuphelper.php
index 6c2feb7..82aa8db 100644
--- a/Rocksolid_Light/rslight/scripts/setuphelper.php
+++ b/Rocksolid_Light/rslight/scripts/setuphelper.php
@@ -24,6 +24,7 @@ return [
 'server_auth_pass' => 'The password for the local server user',
 
 # Site configuration
+'site_shortname' => 'Must be unique from other rslight sites. Blank to disable',
 'rslight_title' => 'The tagline at the top of the web page',
 'title_full' => 'The site title in the client browser bar', 
 'hide_email' => 'Truncate email addresses in From header (1=true, blank=false)',