diff --git a/routers/api/v1/repo/tree.go b/routers/api/v1/repo/tree.go
index 8ba0e01a5..f39a302fa 100644
--- a/routers/api/v1/repo/tree.go
+++ b/routers/api/v1/repo/tree.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
 package repo
 
 import (