diff --git a/services/wspr/wsprd/lib/server.go b/services/wspr/wsprd/lib/server.go
index 035f635..1ff9a32 100644
--- a/services/wspr/wsprd/lib/server.go
+++ b/services/wspr/wsprd/lib/server.go
@@ -162,6 +162,8 @@
 }
 
 func (s *server) publish(name string) (string, error) {
+	s.Lock()
+	defer s.Unlock()
 	if s.endpoint == "" {
 		endpoint, err := s.server.Listen("veyron", s.veyronProxy)