diff --git a/consensus/consensus.go b/consensus/consensus.go
index 64297be87c..1379898828 100644
--- a/consensus/consensus.go
+++ b/consensus/consensus.go
@@ -74,8 +74,6 @@ type Consensus struct {
 	prepareBitmap        *bls_cosi.Mask
 	commitBitmap         *bls_cosi.Mask
 
-	multiSigBitmap *bls_cosi.Mask // Bitmap for parsing multisig bitmap from validators
-
 	pendingCXReceipts map[utils.CXKey]*types.CXReceiptsProof // All the receipts received but not yet processed for Consensus
 	// Registry for services.
 	registry *registry.Registry
diff --git a/consensus/consensus_service.go b/consensus/consensus_service.go
index ac809a6dca..94612d37e2 100644
--- a/consensus/consensus_service.go
+++ b/consensus/consensus_service.go
@@ -141,11 +141,8 @@ func (consensus *Consensus) updateBitmaps() {
 	members := consensus.decider.Participants()
 	prepareBitmap := bls_cosi.NewMask(members)
 	commitBitmap := bls_cosi.NewMask(members)
-	multiSigBitmap := bls_cosi.NewMask(members)
 	consensus.prepareBitmap = prepareBitmap
 	consensus.commitBitmap = commitBitmap
-	consensus.multiSigBitmap = multiSigBitmap
-
 }
 
 func (consensus *Consensus) sendLastSignPower() {
diff --git a/consensus/fbft_log.go b/consensus/fbft_log.go
index 60c4d248e1..604f5c2776 100644
--- a/consensus/fbft_log.go
+++ b/consensus/fbft_log.go
@@ -344,7 +344,8 @@ func (consensus *Consensus) parseFBFTMessage(msg *msg_pb.Message) (*FBFTMessage,
 		copy(pbftMsg.SenderPubkeys[0].Bytes[:], consensusMsg.SenderPubkey[:])
 	} else {
 		// else, it should be a multi-key message where the bitmap is populated
-		pubKeys, err := consensus.multiSigBitmap.GetSignedPubKeysFromBitmap(pbftMsg.SenderPubkeyBitmap)
+		members := consensus.decider.Participants()
+		pubKeys, err := bls_cosi.NewMask(members).GetSignedPubKeysFromBitmap(pbftMsg.SenderPubkeyBitmap)
 		if err != nil {
 			return nil, err
 		}