diff --git a/trie/zk_trie.go b/trie/zk_trie.go
index ed266c518e..044e18ad66 100644
--- a/trie/zk_trie.go
+++ b/trie/zk_trie.go
@@ -127,8 +127,6 @@ func (t *ZkTrie) Commit(LeafCallback) (common.Hash, int, error) {
 	if err := t.ZkTrie.Commit(); err != nil {
 		return common.Hash{}, 0, err
 	}
-	// in current implmentation, every update of trie already writes into database
-	// so Commmit does nothing
 	return t.Hash(), 0, nil
 }