diff --git a/webui/config.php b/webui/config.php
index c3c9430..06a618f 100644
--- a/webui/config.php
+++ b/webui/config.php
@@ -57,6 +57,8 @@
 //$config['LDAP_DISTRIBUTIONLIST_OBJECTCLASS'] = 'dominoGroup');
 //$config['LDAP_DISTRIBUTIONLIST_ATTR'] = 'mail';
 
+// enable single sign-on (disabled by default)
+$config['ENABLE_SSO_LOGIN'] = 0;
 
 // enable authentication against an imap server (disabled by default)