diff --git a/.clang-format b/.clang-format
index 2c73cd8..0547576 100644
--- a/.clang-format
+++ b/.clang-format
@@ -1,3 +1,17 @@
+# Copyright 2019 Google LLC
+#
+# 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
+#
+#      https://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.
+
 # All of IREE is in the Google style except for iree/compiler/, which follows
 # mostly LLVM style (for naming/etc) but the Google formatting (because internal
 # tooling has... issues).