diff --git a/osbase/blockdev/blockdev.go b/osbase/blockdev/blockdev.go
index 9cf4ee2..a8d55cb 100644
--- a/osbase/blockdev/blockdev.go
+++ b/osbase/blockdev/blockdev.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package blockdev
 
 import (