diff --git a/nf.go b/nf.go
index d8b94f4..9692fc4 100644
--- a/nf.go
+++ b/nf.go
@@ -53,7 +53,7 @@ func New(config ...Config) *App {
 		app.config = defaultConfig
 	}
 
-	app.RouterGroup = &RouterGroup{app: app}
+	app.RouterGroup = &RouterGroup{app: app, prefix: "/"}
 	app.groups = []*RouterGroup{app.RouterGroup}
 
 	if !app.config.DisableLogger {
diff --git a/router.go b/router.go
index d796f8d..b91da52 100644
--- a/router.go
+++ b/router.go
@@ -48,7 +48,7 @@ func (r *router) getRoute(method string, path string) (*_node, map[string]string
 	root, ok := r.roots[method]
 
 	if !ok {
-		return nil, nil
+		return &_node{}, nil
 	}
 
 	n := root.search(searchParts, 0)
diff --git a/xtest/midd/main.go b/xtest/midd/main.go
new file mode 100644
index 0000000..eebafce
--- /dev/null
+++ b/xtest/midd/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"github.com/loveuer/nf"
+	"log"
+)
+
+func main() {
+	app := nf.New()
+
+	app.Use(ml())
+	app.Get("/hello", func(c *nf.Ctx) error {
+		return c.SendString("world")
+	})
+
+	log.Fatal(app.Run(":7777"))
+}
+
+func ml() nf.HandlerFunc {
+	return func(c *nf.Ctx) error {
+		log.Printf("[ML] [%s] - [%s]", c.Method, c.Path())
+		return c.Next()
+	}
+}