diff --git a/eth/api.go b/eth/api.go
index 98d126958..3ec72c58e 100644
--- a/eth/api.go
+++ b/eth/api.go
@@ -343,7 +343,7 @@ func (api *PrivateDebugAPI) GetBadBlocks(ctx context.Context) ([]*BadBlockArgs,
 		} else {
 			blockRlp = fmt.Sprintf("0x%x", rlpBytes)
 		}
-		if blockJSON, err = ethapi.RPCMarshalBlock(block, true, true); err != nil {
+		if blockJSON, err = ethapi.RPCMarshalBlock(block, true, true, api.eth.APIBackend.ChainConfig()); err != nil {
 			blockJSON = map[string]interface{}{"error": err.Error()}
 		}
 		results = append(results, &BadBlockArgs{
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 1b09420b0..4f00370cb 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1206,7 +1206,7 @@ func RPCMarshalHeader(head *types.Header) map[string]interface{} {
 // RPCMarshalBlock converts the given block to the RPC output which depends on fullTx. If inclTx is true transactions are
 // returned. When fullTx is true the returned block contains full transaction details, otherwise it will only contain
 // transaction hashes.
-func RPCMarshalBlock(block *types.Block, inclTx bool, fullTx bool) (map[string]interface{}, error) {
+func RPCMarshalBlock(block *types.Block, inclTx bool, fullTx bool, config *params.ChainConfig) (map[string]interface{}, error) {
 	fields := RPCMarshalHeader(block.Header())
 	fields["size"] = hexutil.Uint64(block.Size())
 
@@ -1216,7 +1216,7 @@ func RPCMarshalBlock(block *types.Block, inclTx bool, fullTx bool) (map[string]i
 		}
 		if fullTx {
 			formatTx = func(tx *types.Transaction) (interface{}, error) {
-				return newRPCTransactionFromBlockHash(block, tx.Hash()), nil
+				return newRPCTransactionFromBlockHash(block, tx.Hash(), config), nil
 			}
 		}
 		txs := block.Transactions()
@@ -1250,7 +1250,7 @@ func (s *PublicBlockChainAPI) rpcMarshalHeader(ctx context.Context, header *type
 // rpcMarshalBlock uses the generalized output filler, then adds the total difficulty field, which requires
 // a `PublicBlockchainAPI`.
 func (s *PublicBlockChainAPI) rpcMarshalBlock(ctx context.Context, b *types.Block, inclTx bool, fullTx bool) (map[string]interface{}, error) {
-	fields, err := RPCMarshalBlock(b, inclTx, fullTx)
+	fields, err := RPCMarshalBlock(b, inclTx, fullTx, s.b.ChainConfig())
 	if err != nil {
 		return nil, err
 	}
@@ -1285,17 +1285,8 @@ type RPCTransaction struct {
 
 // newRPCTransaction returns a transaction that will serialize to the RPC
 // representation, with the given location metadata set (if available).
-func newRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber uint64, index uint64, baseFee *big.Int) *RPCTransaction {
-	// Determine the signer. For replay-protected transactions, use the most permissive
-	// signer, because we assume that signers are backwards-compatible with old
-	// transactions. For non-protected transactions, the homestead signer signer is used
-	// because the return value of ChainId is zero for those transactions.
-	var signer types.Signer
-	if tx.Protected() {
-		signer = types.LatestSignerForChainID(tx.ChainId())
-	} else {
-		signer = types.HomesteadSigner{}
-	}
+func newRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber uint64, index uint64, baseFee *big.Int, config *params.ChainConfig) *RPCTransaction {
+	signer := types.MakeSigner(config, big.NewInt(0).SetUint64(blockNumber))
 	from, _ := types.Sender(signer, tx)
 	v, r, s := tx.RawSignatureValues()
 	result := &RPCTransaction{
@@ -1346,16 +1337,16 @@ func newRPCPendingTransaction(tx *types.Transaction, current *types.Header, conf
 	if current != nil {
 		baseFee = misc.CalcBaseFee(config, current)
 	}
-	return newRPCTransaction(tx, common.Hash{}, 0, 0, baseFee)
+	return newRPCTransaction(tx, common.Hash{}, 0, 0, baseFee, config)
 }
 
 // newRPCTransactionFromBlockIndex returns a transaction that will serialize to the RPC representation.
-func newRPCTransactionFromBlockIndex(b *types.Block, index uint64) *RPCTransaction {
+func newRPCTransactionFromBlockIndex(b *types.Block, index uint64, config *params.ChainConfig) *RPCTransaction {
 	txs := b.Transactions()
 	if index >= uint64(len(txs)) {
 		return nil
 	}
-	return newRPCTransaction(txs[index], b.Hash(), b.NumberU64(), index, b.BaseFee())
+	return newRPCTransaction(txs[index], b.Hash(), b.NumberU64(), index, b.BaseFee(), config)
 }
 
 // newRPCRawTransactionFromBlockIndex returns the bytes of a transaction given a block and a transaction index.
@@ -1369,10 +1360,10 @@ func newRPCRawTransactionFromBlockIndex(b *types.Block, index uint64) hexutil.By
 }
 
 // newRPCTransactionFromBlockHash returns a transaction that will serialize to the RPC representation.
-func newRPCTransactionFromBlockHash(b *types.Block, hash common.Hash) *RPCTransaction {
+func newRPCTransactionFromBlockHash(b *types.Block, hash common.Hash, config *params.ChainConfig) *RPCTransaction {
 	for idx, tx := range b.Transactions() {
 		if tx.Hash() == hash {
-			return newRPCTransactionFromBlockIndex(b, uint64(idx))
+			return newRPCTransactionFromBlockIndex(b, uint64(idx), config)
 		}
 	}
 	return nil
@@ -1513,7 +1504,7 @@ func (s *PublicTransactionPoolAPI) GetBlockTransactionCountByHash(ctx context.Co
 // GetTransactionByBlockNumberAndIndex returns the transaction for the given block number and index.
 func (s *PublicTransactionPoolAPI) GetTransactionByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index hexutil.Uint) *RPCTransaction {
 	if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {
-		return newRPCTransactionFromBlockIndex(block, uint64(index))
+		return newRPCTransactionFromBlockIndex(block, uint64(index), s.b.ChainConfig())
 	}
 	return nil
 }
@@ -1521,7 +1512,7 @@ func (s *PublicTransactionPoolAPI) GetTransactionByBlockNumberAndIndex(ctx conte
 // GetTransactionByBlockHashAndIndex returns the transaction for the given block hash and index.
 func (s *PublicTransactionPoolAPI) GetTransactionByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index hexutil.Uint) *RPCTransaction {
 	if block, _ := s.b.BlockByHash(ctx, blockHash); block != nil {
-		return newRPCTransactionFromBlockIndex(block, uint64(index))
+		return newRPCTransactionFromBlockIndex(block, uint64(index), s.b.ChainConfig())
 	}
 	return nil
 }
@@ -1573,7 +1564,7 @@ func (s *PublicTransactionPoolAPI) GetTransactionByHash(ctx context.Context, has
 		if err != nil {
 			return nil, err
 		}
-		return newRPCTransaction(tx, blockHash, blockNumber, index, header.BaseFee), nil
+		return newRPCTransaction(tx, blockHash, blockNumber, index, header.BaseFee, s.b.ChainConfig()), nil
 	}
 	// No finalized transaction, try to retrieve it from the pool
 	if tx := s.b.GetPoolTransaction(hash); tx != nil {