diff --git a/go/clitable/table.go b/go/clitable/table.go
index ce1f7fa..177f3cd 100644
--- a/go/clitable/table.go
+++ b/go/clitable/table.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package clitable implements tabular display for command line tools.
 //
 // The generated tables are vaguely reminiscent of the output of 'kubectl'. For
diff --git a/go/clitable/table_test.go b/go/clitable/table_test.go
index a84e8b1..1ba4496 100644
--- a/go/clitable/table_test.go
+++ b/go/clitable/table_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package clitable
 
 import (