diff --git a/build/analysis/gofmt/gofmt.go b/build/analysis/gofmt/gofmt.go
index 817ce05..782fa1d 100644
--- a/build/analysis/gofmt/gofmt.go
+++ b/build/analysis/gofmt/gofmt.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package gofmt
 
 import (