diff --git a/internal/trie/node/variants.go b/internal/trie/node/variants.go
index 7f9dc0a6c21..2c75c449049 100644
--- a/internal/trie/node/variants.go
+++ b/internal/trie/node/variants.go
@@ -1,3 +1,6 @@
+// Copyright 2022 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package node
 
 type variant struct {