diff --git a/core/blockchain.go b/core/blockchain.go
index 7fac44c075..4b38922f91 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -987,8 +987,9 @@ func (bc *BlockChain) procFutureBlocks() {
 			if i == len(blocks)-1 && err == nil {
 				engine, ok := bc.Engine().(*XDPoS.XDPoS)
 				if ok {
+					j := i
 					go func() {
-						header := blocks[i].Header()
+						header := blocks[j].Header()
 						err = engine.HandleProposedBlock(bc, header)
 						if err != nil {
 							log.Info("[procFutureBlocks] handle proposed block has error", "err", err, "block hash", header.Hash(), "number", header.Number)