diff --git a/osbase/build/fsspec/utils.go b/osbase/build/fsspec/utils.go
index f5a45e3..b291376 100644
--- a/osbase/build/fsspec/utils.go
+++ b/osbase/build/fsspec/utils.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package fsspec
 
 import (