diff --git a/consensus/metrics.go b/consensus/metrics.go
index dc9f1d693..4e9ebe98c 100644
--- a/consensus/metrics.go
+++ b/consensus/metrics.go
@@ -258,7 +258,7 @@ func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics {
 			Subsystem: MetricsSubsystem,
 			Name:      "duplicate_vote_receive",
 			Help:      "Number of votes received multiple times from the same peer by peer",
-		}, append(labels, "peer_id")).With(labelsAndValues...),
+		}, append(labels, "peer_id", "type")).With(labelsAndValues...),
 	}
 }
 
diff --git a/consensus/reactor.go b/consensus/reactor.go
index c7ff8bc97..138479a64 100644
--- a/consensus/reactor.go
+++ b/consensus/reactor.go
@@ -351,7 +351,7 @@ func (conR *Reactor) ReceiveEnvelope(e p2p.Envelope) {
 
 			duplicate := ps.SetReceivedVote(msg.Vote)
 			if duplicate {
-				conR.Metrics.DuplicateVoteReceive.With("peer_id", string(e.Src.ID())).Add(1)
+				conR.Metrics.DuplicateVoteReceive.With("peer_id", string(e.Src.ID()), "type", msg.Vote.Type.String()).Add(1)
 			}
 
 			cs.peerMsgQueue <- msgInfo{msg, e.Src.ID()}
diff --git a/libs/bits/bit_array.go b/libs/bits/bit_array.go
index 9d6901460..d3aa2a444 100644
--- a/libs/bits/bit_array.go
+++ b/libs/bits/bit_array.go
@@ -19,6 +19,8 @@ type BitArray struct {
 	Elems []uint64 `json:"elems"` // NOTE: persisted via reflect, must be exported
 }
 
+// New bit array creates a bit array where all of the bits are initially 'false'
+//
 // NewBitArray returns a new bit array.
 // It returns nil if the number of bits is zero.
 func NewBitArray(bits int) *BitArray {
@@ -39,6 +41,8 @@ func (bA *BitArray) Size() int {
 	return bA.Bits
 }
 
+// The bit array represents true as 1 and false as 0
+//
 // GetIndex returns the bit at index i within the bit array.
 // The behavior is undefined if i >= bA.Bits
 func (bA *BitArray) GetIndex(i int) bool {