diff --git a/metric/handler_oss.go b/metric/handler_oss.go
index a20a4e69..253f3c28 100644
--- a/metric/handler_oss.go
+++ b/metric/handler_oss.go
@@ -27,7 +27,7 @@ type Server struct {
 }
 
 // NewServer returns a new metrics server.
-func NewServer(session core.Session) *Server {
+func NewServer(session core.Session, anonymous bool) *Server {
 	return new(Server)
 }