diff --git a/erigon-lib/chain/chain_config.go b/erigon-lib/chain/chain_config.go
index 845e8a178eb..6057e651e4b 100644
--- a/erigon-lib/chain/chain_config.go
+++ b/erigon-lib/chain/chain_config.go
@@ -32,8 +32,8 @@ import (
 // that any network, identified by its genesis block, can have its own
 // set of configuration options.
 type Config struct {
-	ChainName string   `json:"chainName"`
-	ChainID   *big.Int `json:"chainId"` // chainId identifies the current chain and is used for replay protection
+	ChainName string   `json:"chainName"` // chain name, eg: mainnet, sepolia, bor-mainnet
+	ChainID   *big.Int `json:"chainId"`   // chainId identifies the current chain and is used for replay protection
 
 	Consensus ConsensusName `json:"consensus,omitempty"` // aura, ethash or clique