diff --git a/common/types_test.go b/common/types_test.go
index e481db96c35f..0bf9cb4ba959 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 c4ff2de5394f..cb3d7eecb094 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/consensus/posv/posv.go b/consensus/posv/posv.go
index 43c9cf893af2..f168e92c84d1 100644
--- a/consensus/posv/posv.go
+++ b/consensus/posv/posv.go
@@ -370,6 +370,9 @@ func (c *Posv) verifyCascadingFields(chain consensus.ChainReader, header *types.
 	if parent.Time.Uint64()+c.config.Period > header.Time.Uint64() {
 		return ErrInvalidTimestamp
 	}
+	if header.Number.Uint64() > c.config.Epoch && len(header.Validator) == 0 {
+		return consensus.ErrNoValidatorSignature
+	}
 	// Retrieve the snapshot needed to verify this header and cache it
 	snap, err := c.snapshot(chain, number-1, header.ParentHash, parents)
 	if err != nil {
@@ -959,7 +962,7 @@ func (c *Posv) RecoverValidator(header *types.Header) (common.Address, error) {
 	// Retrieve the signature from the header.Validator
 	// len equals 65 bytes
 	if len(header.Validator) != extraSeal {
-		return common.Address{}, consensus.ErrMissingValidatorSignature
+		return common.Address{}, consensus.ErrFailValidatorSignature
 	}
 	// Recover the public key and the Ethereum address
 	pubkey, err := crypto.Ecrecover(sigHash(header).Bytes(), header.Validator)
diff --git a/eth/fetcher/fetcher.go b/eth/fetcher/fetcher.go
index 01f8748c5f2e..4b748c9d1da2 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 {