diff --git a/pkg/pkg.ml b/pkg/pkg.ml
index b3a1bf2..5ea7f0c 100644
--- a/pkg/pkg.ml
+++ b/pkg/pkg.ml
@@ -1,3 +1,5 @@
+(* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved *)
+
 #use "topfind"
 #require "topkg-jbuilder"