diff --git a/common/types_test.go b/common/types_test.go
index fd90e47582..b44f66fe09 100644
--- a/common/types_test.go
+++ b/common/types_test.go
@@ -151,7 +151,7 @@ func BenchmarkAddressHex(b *testing.B) {
 }
 
 func TestRemoveItemInArray(t *testing.T) {
-	array := []Address{HexToAddress("0x0000003"),HexToAddress("0x0000001"), HexToAddress("0x0000002"),HexToAddress("0x0000003")}
+	array := []Address{HexToAddress("0x0000003"), HexToAddress("0x0000001"), HexToAddress("0x0000002"), HexToAddress("0x0000003")}
 	remove := []Address{HexToAddress("0x0000002"), HexToAddress("0x0000004"), HexToAddress("0x0000003")}
 	array = RemoveItemFromArray(array, remove)
 	if len(array) != 1 {
diff --git a/consensus/errors.go b/consensus/errors.go
index c4ff2de539..cb3d7eecb0 100644
--- a/consensus/errors.go
+++ b/consensus/errors.go
@@ -35,5 +35,7 @@ var (
 	// plus one.
 	ErrInvalidNumber = errors.New("invalid block number")
 
-	ErrMissingValidatorSignature = errors.New("missing validator in header")
+	ErrFailValidatorSignature = errors.New("missing validator in header")
+
+	ErrNoValidatorSignature = errors.New("no validator in header")
 )
diff --git a/eth/fetcher/fetcher.go b/eth/fetcher/fetcher.go
index 5756ae3592..318e3b5848 100644
--- a/eth/fetcher/fetcher.go
+++ b/eth/fetcher/fetcher.go
@@ -669,7 +669,7 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
 			time.Sleep(delay)
 			log.Info("Receive future block", "number", block.NumberU64(), "hash", block.Hash().Hex(), "delay", delay)
 			goto again
-		case consensus.ErrMissingValidatorSignature:
+		case consensus.ErrNoValidatorSignature:
 			newBlock := block
 			if f.appendM2HeaderHook != nil {
 				if newBlock, err = f.appendM2HeaderHook(block); err != nil {