diff --git a/registry/mdns/mdns.go b/registry/mdns/mdns.go
index 6ff6ad10..920df3fa 100644
--- a/registry/mdns/mdns.go
+++ b/registry/mdns/mdns.go
@@ -1,3 +1,4 @@
+// Package mdns is a multicast dns registry
 package mdns
 
 /*