diff --git a/lib/default.php b/lib/default.php
index c7c89faf5c..58d0d9a0e0 100644
--- a/lib/default.php
+++ b/lib/default.php
@@ -52,7 +52,7 @@ $default =
               'timezone' => 'UTC',
               'broughtbyurl' => null,
               'closed' => false,
-              'inviteonly' => false,
+              'inviteonly' => true,
               'private' => true,
               'ssl' => 'never',
               'sslserver' => null,