diff --git a/templates/cassandra.yaml.erb b/templates/cassandra.yaml.erb
index c1c9f29..304e2d4 100755
--- a/templates/cassandra.yaml.erb
+++ b/templates/cassandra.yaml.erb
@@ -1 +1,5 @@
+# This file is managed by Puppet.  Manual changes are likely to be
+# overwritten.  If you see that the YAML indentation looks somewhat strange,
+# don't worry, please see the following ticker for more details.
+# https://tickets.puppetlabs.com/browse/PUP-3120
 <%= @settings.to_yaml() %>