diff --git a/webapp/web/css/jquery_plugins/jquery.realperson.css b/webapp/web/css/jquery_plugins/jquery.realperson.css
index 35deac801..ce5c471bc 100644
--- a/webapp/web/css/jquery_plugins/jquery.realperson.css
+++ b/webapp/web/css/jquery_plugins/jquery.realperson.css
@@ -1,3 +1,5 @@
+/* $This file is distributed under the terms of the license in /doc/license.txt$ */
+
 /* Real Person jQuery plugin styles v1.0.1. */
 .realperson-challenge {
 	display: inline-block;