diff --git a/main/auth/inscription.php b/main/auth/inscription.php
index ff0235f697..1fc6f85d6d 100755
--- a/main/auth/inscription.php
+++ b/main/auth/inscription.php
@@ -19,6 +19,8 @@ require_once api_get_path(LIBRARY_PATH).'mail.lib.inc.php';
 
 $htmlHeadXtra[] = api_get_password_checker_js('#username', '#pass1');
 
+// User is not allowed if Terms and Conditions are disabled and
+// registration is disabled too.
 $isNotAllowedHere = api_get_setting('allow_terms_conditions') === 'false' &&
     api_get_setting('allow_registration') === 'false';