diff --git a/config.sample/norelayclients b/config.sample/norelayclients
index 5fab985..1ac21a4 100644
--- a/config.sample/norelayclients
+++ b/config.sample/norelayclients
@@ -1,3 +1,4 @@
+# used by plugins/relay
 # test entries - http://tools.ietf.org/html/rfc5737
 192.0.99.5
 192.0.99.6
diff --git a/config.sample/relayclients b/config.sample/relayclients
index 13c9be7..792c76b 100644
--- a/config.sample/relayclients
+++ b/config.sample/relayclients
@@ -1,3 +1,4 @@
+# used by plugins/relay
 # Format is IP, or IP part with trailing dot
 # e.g. "127.0.0.1", or "192.168."
 127.0.0.1