diff --git a/tools/run_tests/sanity/check_buildifier.sh b/tools/run_tests/sanity/check_buildifier.sh
index 15b4ff956bd..c8f15c1c838 100755
--- a/tools/run_tests/sanity/check_buildifier.sh
+++ b/tools/run_tests/sanity/check_buildifier.sh
@@ -1,4 +1,19 @@
 #! /bin/bash -ex
+# Copyright 2019 The gRPC Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The script to sanitize Bazel files
 
 GIT_ROOT="$(dirname "$0")/../../.."
 TMP_ROOT="/tmp/buildifier_grpc"