diff --git a/templates/daemon.systemd.erb b/templates/daemon.systemd.erb
index 1b832c0aa..4b726fff7 100644
--- a/templates/daemon.systemd.erb
+++ b/templates/daemon.systemd.erb
@@ -1,3 +1,4 @@
+# THIS FILE IS MANAGED BY PUPPET
 [Unit]
 Description=Prometheus <%= @name %>
 Wants=basic.target