diff --git a/promql/value.go b/promql/value.go
index 202af3f430..b7cf041d12 100644
--- a/promql/value.go
+++ b/promql/value.go
@@ -1,4 +1,4 @@
-// Copyright 2020 The Prometheus Authors
+// Copyright 2017 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