diff --git a/main/survey/generate_link.php b/main/survey/generate_link.php
index 7bec1ed6b2..53e03bb8d8 100644
--- a/main/survey/generate_link.php
+++ b/main/survey/generate_link.php
@@ -1,5 +1,7 @@
 <?php
 
+/* For licensing terms, see /license.txt */
+
 $language_file = 'survey';
 require_once '../inc/global.inc.php';
 
diff --git a/main/survey/link.php b/main/survey/link.php
index 4715f6ff61..c7acdf30fb 100644
--- a/main/survey/link.php
+++ b/main/survey/link.php
@@ -1,4 +1,5 @@
 <?php
+/* For licensing terms, see /license.txt */
 
 require_once '../inc/global.inc.php';