diff --git a/preload.go b/preload.go
index 2cb518b9..5127ad09 100644
--- a/preload.go
+++ b/preload.go
@@ -1,3 +1,7 @@
+// Copyright 2023 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package xorm
 
 import (
diff --git a/preload_test.go b/preload_test.go
index 0b3892f1..48235048 100644
--- a/preload_test.go
+++ b/preload_test.go
@@ -1,3 +1,7 @@
+// Copyright 2023 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package xorm
 
 import (