diff --git a/cluster/cluster.go b/cluster/cluster.go
index b1ca2b77..f6cd4926 100644
--- a/cluster/cluster.go
+++ b/cluster/cluster.go
@@ -190,9 +190,11 @@ func (p *Peer) Peers() []*memberlist.Node {
 // State is a piece of state that can be serialized and merged with other
 // serialized state.
 type State interface {
+	// MarshalBinary serializes the underlying state.
 	MarshalBinary() ([]byte, error)
+
+	// Merge merges serialized state into the underlying state.
 	Merge(b []byte) error
-	MergeSingle(b []byte) error
 }
 
 // Channel allows clients to send messages for a specific state type that will be
@@ -273,7 +275,7 @@ func (d *delegate) NotifyMsg(b []byte) {
 	if !ok {
 		return
 	}
-	if err := s.MergeSingle(p.Data); err != nil {
+	if err := s.Merge(p.Data); err != nil {
 		level.Warn(d.logger).Log("msg", "merge broadcast", "err", err)
 		return
 	}
diff --git a/nflog/nflog.go b/nflog/nflog.go
index 4ddb0fc6..494189bf 100644
--- a/nflog/nflog.go
+++ b/nflog/nflog.go
@@ -489,6 +489,7 @@ func (l *Log) MarshalBinary() ([]byte, error) {
 	return l.st.MarshalBinary()
 }
 
+// Merge serialized silence state into own state.
 func (l *Log) Merge(b []byte) error {
 	st, err := decodeState(bytes.NewReader(b))
 	if err != nil {
@@ -503,17 +504,8 @@ func (l *Log) Merge(b []byte) error {
 	return nil
 }
 
-func (l *Log) MergeSingle(b []byte) error {
-	var e pb.MeshEntry
-	if err := proto.Unmarshal(b, &e); err != nil {
-		return err
-	}
-	l.mtx.Lock()
-	l.st.merge(&e)
-	l.mtx.Unlock()
-	return nil
-}
-
+// SetBroadcast sets a broadcast callback that will be invoked with serialized state
+// on updates.
 func (l *Log) SetBroadcast(f func([]byte)) {
 	l.mtx.Lock()
 	l.broadcast = f