diff --git a/config/config.sample.php b/config/config.sample.php
index 105d4759cc..7b533a8b9c 100644
--- a/config/config.sample.php
+++ b/config/config.sample.php
@@ -235,4 +235,7 @@ $CONFIG = array(
 'openssl' => array(
 	//'config' => '/absolute/location/of/openssl.cnf',
 ),
+
+/* whether usage of the instance should be restricted to admin users only */
+'singleuser' => false,
 );