diff --git a/internal/trie/node/stats.go b/internal/trie/node/stats.go
index 478cda15639..61ad8045ccc 100644
--- a/internal/trie/node/stats.go
+++ b/internal/trie/node/stats.go
@@ -1,3 +1,6 @@
+// Copyright 2022 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package node
 
 // GetDescendants returns the number of descendants in the branch.
diff --git a/internal/trie/node/stats_test.go b/internal/trie/node/stats_test.go
index afa6599bb99..d96563d0dc5 100644
--- a/internal/trie/node/stats_test.go
+++ b/internal/trie/node/stats_test.go
@@ -1,3 +1,6 @@
+// Copyright 2022 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package node
 
 import (