diff --git a/pixiecore/pixiecore.go b/pixiecore/pixiecore.go
index b9b2045..7587a7a 100644
--- a/pixiecore/pixiecore.go
+++ b/pixiecore/pixiecore.go
@@ -217,6 +217,7 @@ func (s *Server) Serve() error {
 	return err
 }
 
+// Shutdown causes Serve() to exit, cleaning up behind itself.
 func (s *Server) Shutdown() {
 	select {
 	case s.errs <- nil: