diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 0aeec8ad10..b3fd4522a9 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -356,11 +356,7 @@ func (s *PrivateAccountAPI) signTransaction(ctx context.Context, args *SendTxArg
 	// Assemble the transaction and sign with the wallet
 	tx := args.toTransaction()
 
-	var chainID *big.Int
-	if config := s.b.ChainConfig(); config.IsEIP155(s.b.CurrentBlock().Number()) {
-		chainID = config.ChainID
-	}
-	return wallet.SignTxWithPassphrase(account, passwd, tx, chainID)
+	return wallet.SignTxWithPassphrase(account, passwd, tx, s.b.ChainConfig().ChainID)
 }
 
 // SendTransaction will create a transaction from the given arguments and
@@ -1186,11 +1182,7 @@ func (s *PublicTransactionPoolAPI) sign(addr common.Address, tx *types.Transacti
 		return nil, err
 	}
 	// Request the wallet to sign the transaction
-	var chainID *big.Int
-	if config := s.b.ChainConfig(); config.IsEIP155(s.b.CurrentBlock().Number()) {
-		chainID = config.ChainID
-	}
-	return wallet.SignTx(account, tx, chainID)
+	return wallet.SignTx(account, tx, s.b.ChainConfig().ChainID)
 }
 
 // SendTxArgs represents the arguments to sumbit a new transaction into the transaction pool.
@@ -1306,11 +1298,7 @@ func (s *PublicTransactionPoolAPI) SendTransaction(ctx context.Context, args Sen
 	// Assemble the transaction and sign with the wallet
 	tx := args.toTransaction()
 
-	var chainID *big.Int
-	if config := s.b.ChainConfig(); config.IsEIP155(s.b.CurrentBlock().Number()) {
-		chainID = config.ChainID
-	}
-	signed, err := wallet.SignTx(account, tx, chainID)
+	signed, err := wallet.SignTx(account, tx, s.b.ChainConfig().ChainID)
 	if err != nil {
 		return common.Hash{}, err
 	}