diff --git a/osbase/bootparam/bootparam.go b/osbase/bootparam/bootparam.go
index 240abf3..86f6871 100644
--- a/osbase/bootparam/bootparam.go
+++ b/osbase/bootparam/bootparam.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package bootparam implements encoding and decoding of Linux kernel command
 // lines as documented in
 // https://docs.kernel.org/admin-guide/kernel-parameters.html
diff --git a/osbase/bootparam/bootparam_test.go b/osbase/bootparam/bootparam_test.go
index d864523..97711fd 100644
--- a/osbase/bootparam/bootparam_test.go
+++ b/osbase/bootparam/bootparam_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // If this is bootparam we have an import cycle
 package bootparam_test
 
diff --git a/osbase/bootparam/params.go b/osbase/bootparam/params.go
index bbb4fae..e90bde7 100644
--- a/osbase/bootparam/params.go
+++ b/osbase/bootparam/params.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package bootparam
 
 import (
diff --git a/osbase/bootparam/params_test.go b/osbase/bootparam/params_test.go
index c76dd88..85cf22a 100644
--- a/osbase/bootparam/params_test.go
+++ b/osbase/bootparam/params_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package bootparam
 
 import "testing"
diff --git a/osbase/bootparam/ref/ref.go b/osbase/bootparam/ref/ref.go
index cf16b09..bb2e844 100644
--- a/osbase/bootparam/ref/ref.go
+++ b/osbase/bootparam/ref/ref.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package ref provides the reference implementation for kernel command line
 // parsing as present in the Linux kernel. This is a separate package and
 // not part of the bootparam tests because Go does not let you use cgo in