diff --git a/core/maingate.go b/core/maingate.go
index 5e9d287..7131a91 100644
--- a/core/maingate.go
+++ b/core/maingate.go
@@ -395,6 +395,8 @@ func (mg *Maingate) prepare(context context.Context) (err error) {
 	return nil
 }
 
+var portptr = flagx.Int("port", 80, "")
+
 func (mg *Maingate) RegisterHandlers(ctx context.Context, serveMux *http.ServeMux, prefix string) error {
 	var allServices []*serviceDescription
 	if err := mg.mongoClient.AllAs(CollectionService, &allServices, options.Find().SetReturnKey(false)); err != nil {
@@ -414,7 +416,6 @@ func (mg *Maingate) RegisterHandlers(ctx context.Context, serveMux *http.ServeMu
 		}
 
 		if *devflag {
-			host, _ := os.Hostname()
 			addrs, err := net.InterfaceAddrs()
 			if err != nil {
 				return logger.ErrorWithCallStack(err)
@@ -429,13 +430,13 @@ func (mg *Maingate) RegisterHandlers(ctx context.Context, serveMux *http.ServeMu
 			}
 
 			empty.Divisions = map[string]*Division{
-				host: {
+				"default": {
 					DivisionForUser: DivisionForUser{
 						Priority: 0,
 						State:    DivisionState_FullOpen,
 					},
 
-					Url: fmt.Sprintf("http://%s/warehouse", ipaddr),
+					Url: fmt.Sprintf("http://%s:%d/warehouse", ipaddr, *portptr),
 				},
 			}
 		}