diff --git a/collector/cpu_openbsd.go b/collector/cpu_openbsd.go
index 15749872..13ee99ac 100644
--- a/collector/cpu_openbsd.go
+++ b/collector/cpu_openbsd.go
@@ -1,4 +1,4 @@
-// Copyright 2020 The Prometheus Authors
+// Copyright 2018 The Prometheus Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at