diff --git a/tools/build_defs/oss/preload.bzl b/tools/build_defs/oss/preload.bzl
index 2db2223185d..af06bd98656 100644
--- a/tools/build_defs/oss/preload.bzl
+++ b/tools/build_defs/oss/preload.bzl
@@ -1,3 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
 # These are symbols that are available in newer versions of Buck, but not the open source one.
 
 def oncall(_team):