diff --git a/kern/compare.go b/kern/compare.go
index 5685a73..32c39e1 100644
--- a/kern/compare.go
+++ b/kern/compare.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2024-2026 Celestino Amoroso (celestino.amoroso@gmail.com).
+// All rights reserved.
+
 package kern
 
 import "reflect"