diff --git a/templates/unbound/forwarders.conf.erb b/templates/unbound/forwarders.conf.erb
index 61742f5..206c576 100644
--- a/templates/unbound/forwarders.conf.erb
+++ b/templates/unbound/forwarders.conf.erb
@@ -1,13 +1,15 @@
+# File managed by puppet (class profile::unbound), all changes will be lost
+
 forward-zone:
     name: "."
 <% @forwarders.each do |forwarder| -%>
     forward-addr: <%= forwarder %>
 <% end -%>
 
 <% @forward_zones.each do |zone, forwarders| -%>
 forward-zone:
     name: "<%= zone %>"
 <% forwarders.each do |forwarder| -%>
     forward-addr: <%= forwarder %>
 <% end -%>
 <% end -%>