diff --git a/tools/gen_header_for_bin_reduce.py b/tools/gen_header_for_bin_reduce.py
index b5321e3f1866241c3b2b653bff3cd3459c79062c..83e7a350bc34677b05e42134345859726ccf78b5 100755
--- a/tools/gen_header_for_bin_reduce.py
+++ b/tools/gen_header_for_bin_reduce.py
@@ -1,5 +1,12 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
+# MegEngine is Licensed under the Apache License, Version 2.0 (the "License")
+#
+# Copyright (c) 2014-2020 Megvii Inc. All rights reserved.
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 
 import sys
 import re