diff --git a/roles/activity-server/tasks/main.yml b/roles/activity-server/tasks/main.yml
index cf4c5917b..de164d6ec 100644
--- a/roles/activity-server/tasks/main.yml
+++ b/roles/activity-server/tasks/main.yml
@@ -77,6 +77,7 @@
             group=root
             mode=0644
 
+# SEE ALSO THE apache2_module SECTION IN roles/httpd/tasks/main.yml
 - name: enable mod_expires for debian
   command: a2enmod expires
   when: is_debuntu | bool