diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index ca8471a187..a0dfac6320 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1698,6 +1698,11 @@ func newRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber
 		result.TransactionIndex = (*hexutil.Uint64)(&index)
 	}
 	switch tx.Type() {
+	case types.LegacyTxType:
+		// if a legacy transaction has an EIP-155 chain id, include it explicitly
+		if id := tx.ChainId(); id.Sign() > 0 {
+			result.ChainID = (*hexutil.Big)(id)
+		}
 	case types.AccessListTxType:
 		al := tx.AccessList()
 		result.Accesses = &al
diff --git a/internal/ethapi/api_test.go b/internal/ethapi/api_test.go
index 8f5eb95b4e..239342a106 100644
--- a/internal/ethapi/api_test.go
+++ b/internal/ethapi/api_test.go
@@ -25,6 +25,7 @@ import (
 	"github.com/XinFinOrg/XDPoSChain/common"
 	"github.com/XinFinOrg/XDPoSChain/core/types"
 	"github.com/XinFinOrg/XDPoSChain/params"
+	"github.com/stretchr/testify/require"
 	"golang.org/x/crypto/sha3"
 )
 
@@ -92,20 +93,168 @@ func TestRPCMarshalBlock(t *testing.T) {
 		{
 			inclTx: false,
 			fullTx: false,
-			want:   `{"difficulty":"0x0","extraData":"0x","gasLimit":"0x0","gasUsed":"0x0","hash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x0000000000000000","number":"0x64","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","penalties":"0x","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x299","stateRoot":"0x0000000000000000000000000000000000000000000000000000000000000000","timestamp":"0x0","transactionsRoot":"0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e","uncles":[],"validator":"0x","validators":"0x"}`,
+			want: `{
+				"difficulty":"0x0",
+				"extraData":"0x",
+				"gasLimit":"0x0",
+				"gasUsed":"0x0",
+				"hash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50",
+				"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+				"miner":"0x0000000000000000000000000000000000000000",
+				"mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"nonce":"0x0000000000000000",
+				"number":"0x64",
+				"parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"penalties":"0x",
+				"receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+				"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+				"size":"0x299",
+				"stateRoot":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"timestamp":"0x0",
+				"transactionsRoot":"0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e",
+				"uncles":[],
+				"validator":"0x",
+				"validators":"0x"
+			}`,
 		},
 		// only tx hashes
 		{
 			inclTx: true,
 			fullTx: false,
-			want:   `{"difficulty":"0x0","extraData":"0x","gasLimit":"0x0","gasUsed":"0x0","hash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x0000000000000000","number":"0x64","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","penalties":"0x","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x299","stateRoot":"0x0000000000000000000000000000000000000000000000000000000000000000","timestamp":"0x0","transactions":["0x7d39df979e34172322c64983a9ad48302c2b889e55bda35324afecf043a77605","0x9bba4c34e57c875ff57ac8d172805a26ae912006985395dc1bdf8f44140a7bf4","0x98909ea1ff040da6be56bc4231d484de1414b3c1dac372d69293a4beb9032cb5","0x12e1f81207b40c3bdcc13c0ee18f5f86af6d31754d57a0ea1b0d4cfef21abef1"],"transactionsRoot":"0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e","uncles":[],"validator":"0x","validators":"0x"}`,
+			want: `{
+				"difficulty":"0x0",
+				"extraData":"0x",
+				"gasLimit":"0x0",
+				"gasUsed":"0x0",
+				"hash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50",
+				"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+				"miner":"0x0000000000000000000000000000000000000000",
+				"mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"nonce":"0x0000000000000000",
+				"number":"0x64",
+				"parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"penalties":"0x",
+				"receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+				"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+				"size":"0x299",
+				"stateRoot":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"timestamp":"0x0",
+				"transactions": [
+					"0x7d39df979e34172322c64983a9ad48302c2b889e55bda35324afecf043a77605",
+					"0x9bba4c34e57c875ff57ac8d172805a26ae912006985395dc1bdf8f44140a7bf4",
+					"0x98909ea1ff040da6be56bc4231d484de1414b3c1dac372d69293a4beb9032cb5",
+					"0x12e1f81207b40c3bdcc13c0ee18f5f86af6d31754d57a0ea1b0d4cfef21abef1"
+				],
+				"transactionsRoot":"0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e",
+				"uncles":[],
+				"validator":"0x",
+				"validators":"0x"
+			}`,
 		},
 
 		// full tx details
 		{
 			inclTx: true,
 			fullTx: true,
-			want:   `{"difficulty":"0x0","extraData":"0x","gasLimit":"0x0","gasUsed":"0x0","hash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x0000000000000000","number":"0x64","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","penalties":"0x","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x299","stateRoot":"0x0000000000000000000000000000000000000000000000000000000000000000","timestamp":"0x0","transactions":[{"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50","blockNumber":"0x64","from":"0x0000000000000000000000000000000000000000","gas":"0x457","gasPrice":"0x2b67","hash":"0x7d39df979e34172322c64983a9ad48302c2b889e55bda35324afecf043a77605","input":"0x111111","nonce":"0x1","to":"0x0000000000000000000000000000000000000011","transactionIndex":"0x0","value":"0x6f","type":"0x1","accessList":[],"chainId":"0x539","v":"0x0","r":"0x0","s":"0x0"},{"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50","blockNumber":"0x64","from":"0x0000000000000000000000000000000000000000","gas":"0x457","gasPrice":"0x2b67","hash":"0x9bba4c34e57c875ff57ac8d172805a26ae912006985395dc1bdf8f44140a7bf4","input":"0x111111","nonce":"0x2","to":"0x0000000000000000000000000000000000000011","transactionIndex":"0x1","value":"0x6f","type":"0x0","v":"0x0","r":"0x0","s":"0x0"},{"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50","blockNumber":"0x64","from":"0x0000000000000000000000000000000000000000","gas":"0x457","gasPrice":"0x2b67","hash":"0x98909ea1ff040da6be56bc4231d484de1414b3c1dac372d69293a4beb9032cb5","input":"0x111111","nonce":"0x3","to":"0x0000000000000000000000000000000000000011","transactionIndex":"0x2","value":"0x6f","type":"0x1","accessList":[],"chainId":"0x539","v":"0x0","r":"0x0","s":"0x0"},{"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50","blockNumber":"0x64","from":"0x0000000000000000000000000000000000000000","gas":"0x457","gasPrice":"0x2b67","hash":"0x12e1f81207b40c3bdcc13c0ee18f5f86af6d31754d57a0ea1b0d4cfef21abef1","input":"0x111111","nonce":"0x4","to":"0x0000000000000000000000000000000000000011","transactionIndex":"0x3","value":"0x6f","type":"0x0","v":"0x0","r":"0x0","s":"0x0"}],"transactionsRoot":"0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e","uncles":[],"validator":"0x","validators":"0x"}`,
+			want: `{
+				"difficulty":"0x0",
+				"extraData":"0x",
+				"gasLimit":"0x0",
+				"gasUsed":"0x0",
+				"hash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50",
+				"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+				"miner":"0x0000000000000000000000000000000000000000",
+				"mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"nonce":"0x0000000000000000",
+				"number":"0x64",
+				"parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"penalties":"0x",
+				"receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+				"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+				"size":"0x299",
+				"stateRoot":"0x0000000000000000000000000000000000000000000000000000000000000000",
+				"timestamp":"0x0",
+				"transactions": [
+					{
+						"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50",
+						"blockNumber":"0x64",
+						"from":"0x0000000000000000000000000000000000000000",
+						"gas":"0x457",
+						"gasPrice":"0x2b67",
+						"hash":"0x7d39df979e34172322c64983a9ad48302c2b889e55bda35324afecf043a77605",
+						"input":"0x111111",
+						"nonce":"0x1",
+						"to":"0x0000000000000000000000000000000000000011",
+						"transactionIndex":"0x0",
+						"value":"0x6f",
+						"type":"0x1",
+						"accessList":[],
+						"chainId": "0x539",
+						"chainId":"0x539",
+						"v":"0x0",
+						"r":"0x0",
+						"s":"0x0"
+					},
+					{
+						"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50",
+						"blockNumber":"0x64",
+						"from":"0x0000000000000000000000000000000000000000",
+						"gas":"0x457",
+						"gasPrice":"0x2b67","hash":"0x9bba4c34e57c875ff57ac8d172805a26ae912006985395dc1bdf8f44140a7bf4",
+						"input":"0x111111",
+						"nonce":"0x2",
+						"to":"0x0000000000000000000000000000000000000011",
+						"transactionIndex":"0x1",
+						"value":"0x6f",
+						"type":"0x0",
+						"chainId": "0x7fffffffffffffee",
+						"v":"0x0",
+						"r":"0x0",
+						"s":"0x0"
+					},
+					{
+						"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50",
+						"blockNumber":"0x64",
+						"from":"0x0000000000000000000000000000000000000000",
+						"gas":"0x457",
+						"gasPrice":"0x2b67",
+						"hash":"0x98909ea1ff040da6be56bc4231d484de1414b3c1dac372d69293a4beb9032cb5",
+						"input":"0x111111",
+						"nonce":"0x3",
+						"to":"0x0000000000000000000000000000000000000011",
+						"transactionIndex":"0x2",
+						"value":"0x6f",
+						"type":"0x1",
+						"accessList":[],
+						"chainId":"0x539",
+						"v":"0x0",
+						"r":"0x0",
+						"s":"0x0"
+					},
+					{
+						"blockHash":"0x2cb4e4b5b5be5a2520377e87e8d7d2cf83fc0783fa6518d67b9606d3c5317b50",
+						"blockNumber":"0x64",
+						"from":"0x0000000000000000000000000000000000000000",
+						"gas":"0x457",
+						"gasPrice":"0x2b67",
+						"hash":"0x12e1f81207b40c3bdcc13c0ee18f5f86af6d31754d57a0ea1b0d4cfef21abef1",
+						"input":"0x111111",
+						"nonce":"0x4",
+						"to":"0x0000000000000000000000000000000000000011",
+						"transactionIndex":"0x3",
+						"value":"0x6f",
+						"type":"0x0",
+						"chainId": "0x7fffffffffffffee",
+						"v":"0x0",
+						"r":"0x0",
+						"s":"0x0"
+					}
+				],
+				"transactionsRoot":"0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e",
+				"uncles":[],
+				"validator":"0x",
+				"validators":"0x"
+			}`,
 		},
 	}
 
@@ -116,8 +265,6 @@ func TestRPCMarshalBlock(t *testing.T) {
 			t.Errorf("test %d: json marshal error: %v", i, err)
 			continue
 		}
-		if have := string(out); have != tc.want {
-			t.Errorf("test %d:\nwant: %s\nhave: %s", i, tc.want, have)
-		}
+		require.JSONEqf(t, tc.want, string(out), "test %d", i)
 	}
 }