diff --git a/cloud/equinix/wrapngo/metrics.go b/cloud/equinix/wrapngo/metrics.go
index fef506b..f6cabcb 100644
--- a/cloud/equinix/wrapngo/metrics.go
+++ b/cloud/equinix/wrapngo/metrics.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package wrapngo
 
 import (