diff --git a/systemd/conservancy-www-cleanup.service b/systemd/conservancy-www-cleanup.service
index fe40af75b03b0624c6a1c935ca081700a9f49e28..5ad0a5603c7c6dff0048466c6a893d7de64bbd88 100644
--- a/systemd/conservancy-www-cleanup.service
+++ b/systemd/conservancy-www-cleanup.service
@@ -1,3 +1,5 @@
+# Remove old Django login sessions.
+
 [Unit]
 Description=Cleanup Conservancy website
 Before=apache2.service