diff --git a/eth/gasprice/gasprice.go b/eth/gasprice/gasprice.go
index a091cc2be6d2..3043a65ca0d8 100644
--- a/eth/gasprice/gasprice.go
+++ b/eth/gasprice/gasprice.go
@@ -23,13 +23,13 @@ import (
 	"sync"
 
 	"github.com/XinFinOrg/XDPoSChain/common"
+	"github.com/XinFinOrg/XDPoSChain/common/lru"
 	"github.com/XinFinOrg/XDPoSChain/core"
 	"github.com/XinFinOrg/XDPoSChain/core/types"
 	"github.com/XinFinOrg/XDPoSChain/event"
 	"github.com/XinFinOrg/XDPoSChain/log"
 	"github.com/XinFinOrg/XDPoSChain/params"
 	"github.com/XinFinOrg/XDPoSChain/rpc"
-	"github.com/XinFinOrg/XDPoSChain/common/lru"
 )
 
 const sampleNumber = 3 // Number of transactions sampled in a block
@@ -176,7 +176,7 @@ func (oracle *Oracle) SuggestTipCap(ctx context.Context) (*big.Int, error) {
 		results   []*big.Int
 	)
 	for sent < oracle.checkBlocks && number > 0 {
-		go oracle.getBlockValues(ctx, types.MakeSigner(oracle.backend.ChainConfig(), big.NewInt(int64(number))), number, sampleNumber, oracle.ignorePrice, result, quit)
+		go oracle.getBlockValues(ctx, number, sampleNumber, oracle.ignorePrice, result, quit)
 		sent++
 		exp++
 		number--
@@ -199,7 +199,7 @@ func (oracle *Oracle) SuggestTipCap(ctx context.Context) (*big.Int, error) {
 		// meaningful returned, try to query more blocks. But the maximum
 		// is 2*checkBlocks.
 		if len(res.values) == 1 && len(results)+1+exp < oracle.checkBlocks*2 && number > 0 {
-			go oracle.getBlockValues(ctx, types.MakeSigner(oracle.backend.ChainConfig(), big.NewInt(int64(number))), number, sampleNumber, oracle.ignorePrice, result, quit)
+			go oracle.getBlockValues(ctx, number, sampleNumber, oracle.ignorePrice, result, quit)
 			sent++
 			exp++
 			number--
@@ -260,11 +260,11 @@ func (s *txSorter) Less(i, j int) bool {
 	return tip1.Cmp(tip2) < 0
 }
 
-// getBlockPrices calculates the lowest transaction gas price in a given block
+// getBlockValues calculates the lowest transaction gas price in a given block
 // and sends it to the result channel. If the block is empty or all transactions
 // are sent by the miner itself(it doesn't make any sense to include this kind of
 // transaction prices for sampling), nil gasprice is returned.
-func (oracle *Oracle) getBlockValues(ctx context.Context, signer types.Signer, blockNum uint64, limit int, ignoreUnder *big.Int, result chan results, quit chan struct{}) {
+func (oracle *Oracle) getBlockValues(ctx context.Context, blockNum uint64, limit int, ignoreUnder *big.Int, result chan results, quit chan struct{}) {
 	block, err := oracle.backend.BlockByNumber(ctx, rpc.BlockNumber(blockNum))
 	if block == nil {
 		select {
@@ -273,6 +273,8 @@ func (oracle *Oracle) getBlockValues(ctx context.Context, signer types.Signer, b
 		}
 		return
 	}
+	signer := types.MakeSigner(oracle.backend.ChainConfig(), block.Number())
+
 	// Sort the transaction by effective tip in ascending sort.
 	txs := make([]*types.Transaction, len(block.Transactions()))
 	copy(txs, block.Transactions())