diff --git a/registry/service/service.go b/registry/service/service.go
index 9585c242..5bc3cffb 100644
--- a/registry/service/service.go
+++ b/registry/service/service.go
@@ -58,13 +58,12 @@ func (s *serviceRegistry) Register(srv *registry.Service, opts ...registry.Regis
 		o(&options)
 	}
 
-	ctx := context.Background()
-	if options.TTL.Nanoseconds() != 0.0 {
-		ctx = context.WithValue(ctx, "register_ttl", options.TTL)
-	}
+	// encode srv into protobuf and pack Register TTL into it
+	pbSrv := ToProto(srv)
+	pbSrv.Options.Ttl = int64(options.TTL.Seconds())
 
 	// register the service
-	_, err := s.client.Register(ctx, ToProto(srv), s.callOpts()...)
+	_, err := s.client.Register(context.TODO(), pbSrv, s.callOpts()...)
 	if err != nil {
 		return err
 	}