diff --git a/server/index.php b/server/index.php
index 7a0f812..5ffd8bf 100644
--- a/server/index.php
+++ b/server/index.php
@@ -11,6 +11,8 @@
 <p>Please visit the students' own websites on this server for more.</p>
 <p>There're currently following websites active:</p>
 <ul>
+  <!-- This requires list-web-users.sh to be running (cron) which should 
+  create the output file here -->
   <?php include 'websites.txt'; ?>
 </ul>