diff --git a/blockchain/store_test.go b/blockchain/store_test.go
index 21ee529f..60d4e481 100644
--- a/blockchain/store_test.go
+++ b/blockchain/store_test.go
@@ -69,8 +69,11 @@ var (
 	partSet     = block.MakePartSet(2)
 	part1       = partSet.GetPart(0)
 	part2       = partSet.GetPart(1)
-	seenCommit1 = &types.Commit{Precommits: []*types.Vote{{Height: 10,
-		Timestamp: time.Now().UTC()}}}
+	seenCommit1 = &types.Commit{
+		Precommits: []*types.CommitSig{{
+			Timestamp: time.Now().UTC()}},
+		HeightNum: 10,
+	}
 )
 
 // TODO: This test should be simplified ...
@@ -90,8 +93,11 @@ func TestBlockStoreSaveLoadBlock(t *testing.T) {
 	// save a block
 	block := makeBlock(bs.Height()+1, state)
 	validPartSet := block.MakePartSet(2)
-	seenCommit := &types.Commit{Precommits: []*types.Vote{{Height: 10,
-		Timestamp: time.Now().UTC()}}}
+	seenCommit := &types.Commit{
+		Precommits: []*types.CommitSig{{
+			Timestamp: time.Now().UTC()}},
+		HeightNum: 10,
+	}
 	bs.SaveBlock(block, partSet, seenCommit)
 	require.Equal(t, bs.Height(), block.Header.Height, "expecting the new height to be changed")
 
@@ -110,8 +116,11 @@ func TestBlockStoreSaveLoadBlock(t *testing.T) {
 
 	// End of setup, test data
 
-	commitAtH10 := &types.Commit{Precommits: []*types.Vote{{Height: 10,
-		Timestamp: time.Now().UTC()}}}
+	commitAtH10 := &types.Commit{
+		Precommits: []*types.CommitSig{{
+			Timestamp: time.Now().UTC()}},
+		HeightNum: 10,
+	}
 	tuples := []struct {
 		block      *types.Block
 		parts      *types.PartSet
@@ -334,8 +343,11 @@ func TestBlockFetchAtHeight(t *testing.T) {
 	block := makeBlock(bs.Height()+1, state)
 
 	partSet := block.MakePartSet(2)
-	seenCommit := &types.Commit{Precommits: []*types.Vote{{Height: 10,
-		Timestamp: time.Now().UTC()}}}
+	seenCommit := &types.Commit{
+		Precommits: []*types.CommitSig{{
+			Timestamp: time.Now().UTC()}},
+		HeightNum: 10,
+	}
 
 	bs.SaveBlock(block, partSet, seenCommit)
 	require.Equal(t, bs.Height(), block.Header.Height, "expecting the new height to be changed")
diff --git a/consensus/reactor_test.go b/consensus/reactor_test.go
index 4a6d4b9d..702d8051 100644
--- a/consensus/reactor_test.go
+++ b/consensus/reactor_test.go
@@ -607,12 +607,6 @@ func validateBlock(block *types.Block, activeVals map[string]struct{}) error {
 	if block.LastCommit.Size() != len(activeVals) {
 		return fmt.Errorf("Commit size doesn't match number of active validators. Got %d, expected %d", block.LastCommit.Size(), len(activeVals))
 	}
-
-	for _, vote := range block.LastCommit.Precommits {
-		if _, ok := activeVals[string(vote.ValidatorAddress)]; !ok {
-			return fmt.Errorf("Found vote for unactive validator %X", vote.ValidatorAddress)
-		}
-	}
 	return nil
 }
 
diff --git a/consensus/replay_test.go b/consensus/replay_test.go
index 8ea71d35..8121f006 100644
--- a/consensus/replay_test.go
+++ b/consensus/replay_test.go
@@ -531,7 +531,7 @@ func makeBlockchainFromWAL(wal WAL) ([]*types.Block, []*types.Commit, error) {
 				if block.Height != height+1 {
 					panic(fmt.Sprintf("read bad block from wal. got height %d, expected %d", block.Height, height+1))
 				}
-				commitHeight := thisBlockCommit.Precommits[0].Height
+				commitHeight := thisBlockCommit.Height()
 				if commitHeight != height+1 {
 					panic(fmt.Sprintf("commit doesnt match. got height %d, expected %d", commitHeight, height+1))
 				}
@@ -549,8 +549,15 @@ func makeBlockchainFromWAL(wal WAL) ([]*types.Block, []*types.Commit, error) {
 		case *types.Vote:
 			if p.Type == types.VoteTypePrecommit {
 				thisBlockCommit = &types.Commit{
-					BlockID:    p.BlockID,
-					Precommits: []*types.Vote{p},
+					BlockID: p.BlockID,
+					Precommits: []*types.CommitSig{
+						&types.CommitSig{
+							Signature: p.Signature,
+							Timestamp: p.Timestamp,
+						},
+					},
+					HeightNum: p.Height,
+					RoundNum:  p.Round,
 				}
 			}
 		}
@@ -564,7 +571,7 @@ func makeBlockchainFromWAL(wal WAL) ([]*types.Block, []*types.Commit, error) {
 	if block.Height != height+1 {
 		panic(fmt.Sprintf("read bad block from wal. got height %d, expected %d", block.Height, height+1))
 	}
-	commitHeight := thisBlockCommit.Precommits[0].Height
+	commitHeight := thisBlockCommit.Height()
 	if commitHeight != height+1 {
 		panic(fmt.Sprintf("commit doesnt match. got height %d, expected %d", commitHeight, height+1))
 	}
diff --git a/consensus/state.go b/consensus/state.go
index debe94da..71a49197 100644
--- a/consensus/state.go
+++ b/consensus/state.go
@@ -453,11 +453,14 @@ func (cs *ConsensusState) reconstructLastCommit(state sm.State) {
 	}
 	seenCommit := cs.blockStore.LoadSeenCommit(state.LastBlockHeight)
 	lastPrecommits := types.NewVoteSet(state.ChainID, state.LastBlockHeight, seenCommit.Round(), types.VoteTypePrecommit, state.LastValidators)
-	for _, precommit := range seenCommit.Precommits {
-		if precommit == nil {
+	for idx := 0; idx < len(seenCommit.Precommits); idx++ {
+		if seenCommit.Precommits[idx] == nil {
 			continue
 		}
-		added, err := lastPrecommits.AddVote(precommit)
+		addr, _ := state.LastValidators.GetByIndex(idx)
+		vote := seenCommit.GetByIndex(idx)
+		vote.ValidatorAddress = addr
+		added, err := lastPrecommits.AddVote(vote)
 		if !added || err != nil {
 			cmn.PanicCrisis(fmt.Sprintf("Failed to reconstruct LastCommit: %v", err))
 		}
@@ -1344,7 +1347,7 @@ func (cs *ConsensusState) recordMetrics(height int64, block *types.Block) {
 	missingValidators := 0
 	missingValidatorsPower := int64(0)
 	for i, val := range cs.Validators.Validators {
-		var vote *types.Vote
+		var vote *types.CommitSig
 		if i < len(block.LastCommit.Precommits) {
 			vote = block.LastCommit.Precommits[i]
 		}
diff --git a/consensus/types/round_state_test.go b/consensus/types/round_state_test.go
index 4d128b18..4a9ddf0b 100644
--- a/consensus/types/round_state_test.go
+++ b/consensus/types/round_state_test.go
@@ -16,7 +16,7 @@ func BenchmarkRoundStateDeepCopy(b *testing.B) {
 	// Random validators
 	nval, ntxs := 100, 100
 	vset, _ := types.RandValidatorSet(nval, 1)
-	precommits := make([]*types.Vote, nval)
+	precommits := make([]*types.CommitSig, nval)
 	blockID := types.BlockID{
 		Hash: cmn.RandBytes(20),
 		PartsHeader: types.PartSetHeader{
@@ -25,11 +25,9 @@ func BenchmarkRoundStateDeepCopy(b *testing.B) {
 	}
 	sig := make([]byte, ed25519.SignatureSize)
 	for i := 0; i < nval; i++ {
-		precommits[i] = &types.Vote{
-			ValidatorAddress: types.Address(cmn.RandBytes(20)),
-			Timestamp:        time.Now(),
-			BlockID:          blockID,
-			Signature:        sig,
+		precommits[i] = &types.CommitSig{
+			Timestamp: time.Now(),
+			Signature: sig,
 		}
 	}
 	txs := make([]types.Tx, ntxs)
diff --git a/lite/helpers.go b/lite/helpers.go
index 9265aeea..6feecfab 100644
--- a/lite/helpers.go
+++ b/lite/helpers.go
@@ -71,7 +71,7 @@ func (pkz privKeys) ToValidators(init, inc int64) *types.ValidatorSet {
 
 // signHeader properly signs the header with all keys from first to last exclusive.
 func (pkz privKeys) signHeader(header *types.Header, first, last int) *types.Commit {
-	votes := make([]*types.Vote, len(pkz))
+	cs := make([]*types.CommitSig, len(pkz))
 
 	// We need this list to keep the ordering.
 	vset := pkz.ToValidators(1, 0)
@@ -79,12 +79,17 @@ func (pkz privKeys) signHeader(header *types.Header, first, last int) *types.Com
 	// Fill in the votes we want.
 	for i := first; i < last && i < len(pkz); i++ {
 		vote := makeVote(header, vset, pkz[i])
-		votes[vote.ValidatorIndex] = vote
+		cs[vote.ValidatorIndex] = &types.CommitSig{
+			Signature: vote.Signature,
+			Timestamp: vote.Timestamp,
+		}
 	}
 
 	res := &types.Commit{
 		BlockID:    types.BlockID{Hash: header.Hash()},
-		Precommits: votes,
+		Precommits: cs,
+		RoundNum:   1,
+		HeightNum:  header.Height,
 	}
 	return res
 }
diff --git a/state/execution.go b/state/execution.go
index ab689f5f..b9e01eb2 100644
--- a/state/execution.go
+++ b/state/execution.go
@@ -241,7 +241,7 @@ func getBeginBlockValidatorInfo(block *types.Block, lastValSet *types.ValidatorS
 	// Collect the vote info (list of validators and whether or not they signed).
 	voteInfos := make([]abci.VoteInfo, len(lastValSet.Validators))
 	for i, val := range lastValSet.Validators {
-		var vote *types.Vote
+		var vote *types.CommitSig
 		if i < len(block.LastCommit.Precommits) {
 			vote = block.LastCommit.Precommits[i]
 		}
diff --git a/state/execution_test.go b/state/execution_test.go
index 4d7c4f99..6b07f8d6 100644
--- a/state/execution_test.go
+++ b/state/execution_test.go
@@ -63,17 +63,17 @@ func TestBeginBlockValidators(t *testing.T) {
 	prevBlockID := types.BlockID{prevHash, prevParts}
 
 	now := time.Now().UTC()
-	vote0 := &types.Vote{ValidatorIndex: 0, Timestamp: now, Type: types.VoteTypePrecommit}
-	vote1 := &types.Vote{ValidatorIndex: 1, Timestamp: now}
+	vote0 := &types.CommitSig{Timestamp: now}
+	vote1 := &types.CommitSig{Timestamp: now}
 
 	testCases := []struct {
 		desc                     string
-		lastCommitPrecommits     []*types.Vote
+		lastCommitPrecommits     []*types.CommitSig
 		expectedAbsentValidators []int
 	}{
-		{"none absent", []*types.Vote{vote0, vote1}, []int{}},
-		{"one absent", []*types.Vote{vote0, nil}, []int{1}},
-		{"multiple absent", []*types.Vote{nil, nil}, []int{0, 1}},
+		{"none absent", []*types.CommitSig{vote0, vote1}, []int{}},
+		{"one absent", []*types.CommitSig{vote0, nil}, []int{1}},
+		{"multiple absent", []*types.CommitSig{nil, nil}, []int{0, 1}},
 	}
 
 	for _, tc := range testCases {
@@ -133,9 +133,9 @@ func TestBeginBlockByzantineValidators(t *testing.T) {
 			types.TM2PB.Evidence(ev2, valSet, now)}},
 	}
 
-	vote0 := &types.Vote{ValidatorIndex: 0, Timestamp: now, Type: types.VoteTypePrecommit}
-	vote1 := &types.Vote{ValidatorIndex: 1, Timestamp: now}
-	votes := []*types.Vote{vote0, vote1}
+	vote0 := &types.CommitSig{Timestamp: now}
+	vote1 := &types.CommitSig{Timestamp: now}
+	votes := []*types.CommitSig{vote0, vote1}
 	lastCommit := &types.Commit{BlockID: prevBlockID, Precommits: votes}
 	for _, tc := range testCases {
 
diff --git a/types/block.go b/types/block.go
index 8588d557..fc933203 100644
--- a/types/block.go
+++ b/types/block.go
@@ -296,49 +296,38 @@ type Commit struct {
 	// NOTE: The Precommits are in order of address to preserve the bonded ValidatorSet order.
 	// Any peer with a block can gossip precommits by index with a peer without recalculating the
 	// active ValidatorSet.
-	BlockID    BlockID `json:"block_id"`
-	Precommits []*Vote `json:"precommits"`
+	BlockID    BlockID      `json:"block_id"`
+	Precommits []*CommitSig `json:"precommits"`
+	RoundNum   int
+	HeightNum  int64
 
 	// Volatile
-	firstPrecommit *Vote
-	hash           cmn.HexBytes
-	bitArray       *cmn.BitArray
+	hash     cmn.HexBytes
+	bitArray *cmn.BitArray
 }
 
-// FirstPrecommit returns the first non-nil precommit in the commit.
-// If all precommits are nil, it returns an empty precommit with height 0.
-func (commit *Commit) FirstPrecommit() *Vote {
-	if len(commit.Precommits) == 0 {
-		return nil
-	}
-	if commit.firstPrecommit != nil {
-		return commit.firstPrecommit
-	}
-	for _, precommit := range commit.Precommits {
-		if precommit != nil {
-			commit.firstPrecommit = precommit
-			return precommit
-		}
-	}
-	return &Vote{
-		Type: VoteTypePrecommit,
-	}
+type CommitSig struct {
+	Signature []byte
+	Timestamp time.Time
+}
+
+func (cs *CommitSig) String(index int, address Address, height int64, round int, blockID BlockID) string {
+	return fmt.Sprintf("Vote{%v:%X %v/%02d/%v(%v) %X %X @ %s}",
+		index, cmn.Fingerprint(address),
+		height, round, VoteTypePrecommit, "Precommit",
+		cmn.Fingerprint(blockID.Hash),
+		cmn.Fingerprint(cs.Signature),
+		CanonicalTime(cs.Timestamp))
 }
 
 // Height returns the height of the commit
 func (commit *Commit) Height() int64 {
-	if len(commit.Precommits) == 0 {
-		return 0
-	}
-	return commit.FirstPrecommit().Height
+	return commit.HeightNum
 }
 
 // Round returns the round of the commit
 func (commit *Commit) Round() int {
-	if len(commit.Precommits) == 0 {
-		return 0
-	}
-	return commit.FirstPrecommit().Round
+	return commit.RoundNum
 }
 
 // Type returns the vote type of the commit, which is always VoteTypePrecommit
@@ -368,8 +357,16 @@ func (commit *Commit) BitArray() *cmn.BitArray {
 }
 
 // GetByIndex returns the vote corresponding to a given validator index
-func (commit *Commit) GetByIndex(index int) *Vote {
-	return commit.Precommits[index]
+func (com *Commit) GetByIndex(index int) *Vote {
+	return &Vote{
+		ValidatorIndex: index,
+		Height:         com.HeightNum,
+		Round:          com.RoundNum,
+		Timestamp:      com.Precommits[index].Timestamp,
+		Type:           VoteTypePrecommit,
+		BlockID:        com.BlockID,
+		Signature:      com.Precommits[index].Signature,
+	}
 }
 
 // IsCommit returns true if there is at least one vote
@@ -386,30 +383,6 @@ func (commit *Commit) ValidateBasic() error {
 	if len(commit.Precommits) == 0 {
 		return errors.New("No precommits in commit")
 	}
-	height, round := commit.Height(), commit.Round()
-
-	// Validate the precommits.
-	for _, precommit := range commit.Precommits {
-		// It's OK for precommits to be missing.
-		if precommit == nil {
-			continue
-		}
-		// Ensure that all votes are precommits.
-		if precommit.Type != VoteTypePrecommit {
-			return fmt.Errorf("Invalid commit vote. Expected precommit, got %v",
-				precommit.Type)
-		}
-		// Ensure that all heights are the same.
-		if precommit.Height != height {
-			return fmt.Errorf("Invalid commit precommit height. Expected %v, got %v",
-				height, precommit.Height)
-		}
-		// Ensure that all rounds are the same.
-		if precommit.Round != round {
-			return fmt.Errorf("Invalid commit precommit round. Expected %v, got %v",
-				round, precommit.Round)
-		}
-	}
 	return nil
 }
 
@@ -435,7 +408,8 @@ func (commit *Commit) StringIndented(indent string) string {
 	}
 	precommitStrings := make([]string, len(commit.Precommits))
 	for i, precommit := range commit.Precommits {
-		precommitStrings[i] = precommit.String()
+		precommitStrings[i] = precommit.String(i, []byte("---"),
+			commit.HeightNum, commit.RoundNum, commit.BlockID)
 	}
 	return fmt.Sprintf(`Commit{
 %s  BlockID:    %v
diff --git a/types/block_test.go b/types/block_test.go
index 8e595776..fbba2515 100644
--- a/types/block_test.go
+++ b/types/block_test.go
@@ -118,7 +118,7 @@ func TestBlockMakePartSetWithEvidence(t *testing.T) {
 
 	partSet := MakeBlock(h, txs, commit, evList).MakePartSet(1024)
 	assert.NotNil(t, partSet)
-	assert.Equal(t, 3, partSet.Total())
+	assert.Equal(t, 2, partSet.Total())
 }
 
 func TestBlockHashesTo(t *testing.T) {
@@ -193,7 +193,6 @@ func TestCommit(t *testing.T) {
 	commit, err := MakeCommit(lastID, h-1, 1, voteSet, vals)
 	require.NoError(t, err)
 
-	assert.NotNil(t, commit.FirstPrecommit())
 	assert.Equal(t, h-1, commit.Height())
 	assert.Equal(t, 1, commit.Round())
 	assert.Equal(t, VoteTypePrecommit, commit.Type())
@@ -204,7 +203,9 @@ func TestCommit(t *testing.T) {
 	require.NotNil(t, commit.BitArray())
 	assert.Equal(t, cmn.NewBitArray(10).Size(), commit.BitArray().Size())
 
-	assert.Equal(t, voteSet.GetByIndex(0), commit.GetByIndex(0))
+	cv := commit.GetByIndex(0)
+	cv.ValidatorAddress = voteSet.GetByIndex(0).ValidatorAddress
+	assert.Equal(t, voteSet.GetByIndex(0), cv)
 	assert.True(t, commit.IsCommit())
 }
 
@@ -216,21 +217,6 @@ func TestCommitValidateBasic(t *testing.T) {
 	commit = randCommit()
 	commit.Precommits[0] = nil
 	assert.NoError(t, commit.ValidateBasic())
-
-	// tamper with types
-	commit = randCommit()
-	commit.Precommits[0].Type = VoteTypePrevote
-	assert.Error(t, commit.ValidateBasic())
-
-	// tamper with height
-	commit = randCommit()
-	commit.Precommits[0].Height = int64(100)
-	assert.Error(t, commit.ValidateBasic())
-
-	// tamper with round
-	commit = randCommit()
-	commit.Precommits[0].Round = 100
-	assert.Error(t, commit.ValidateBasic())
 }
 
 func randCommit() *Commit {
diff --git a/types/validator_set.go b/types/validator_set.go
index 4dab4d84..50254824 100644
--- a/types/validator_set.go
+++ b/types/validator_set.go
@@ -270,34 +270,27 @@ func (vals *ValidatorSet) VerifyCommit(chainID string, blockID BlockID, height i
 	}
 
 	talliedVotingPower := int64(0)
-	round := commit.Round()
+
+	baseVote := Vote{
+		Height:  height,
+		Round:   commit.Round(),
+		Type:    VoteTypePrecommit,
+		BlockID: blockID,
+	}
 
 	for idx, precommit := range commit.Precommits {
 		if precommit == nil {
 			continue // OK, some precommits can be missing.
 		}
-		if precommit.Height != height {
-			return fmt.Errorf("Invalid commit -- wrong height: want %v got %v", height, precommit.Height)
-		}
-		if precommit.Round != round {
-			return fmt.Errorf("Invalid commit -- wrong round: want %v got %v", round, precommit.Round)
-		}
-		if precommit.Type != VoteTypePrecommit {
-			return fmt.Errorf("Invalid commit -- not precommit @ index %v", idx)
-		}
 		_, val := vals.GetByIndex(idx)
+		baseVote.Timestamp = precommit.Timestamp
 		// Validate signature.
-		precommitSignBytes := precommit.SignBytes(chainID)
+		precommitSignBytes := baseVote.SignBytes(chainID)
 		if !val.PubKey.VerifyBytes(precommitSignBytes, precommit.Signature) {
 			return fmt.Errorf("Invalid commit -- invalid signature: %v", precommit)
 		}
 		// Good precommit!
-		if blockID.Equals(precommit.BlockID) {
-			talliedVotingPower += val.VotingPower
-		} else {
-			// It's OK that the BlockID doesn't match.  We include stray
-			// precommits to measure validator availability.
-		}
+		talliedVotingPower += val.VotingPower
 	}
 
 	if talliedVotingPower > vals.TotalVotingPower()*2/3 {
@@ -349,40 +342,33 @@ func (vals *ValidatorSet) VerifyFutureCommit(newSet *ValidatorSet, chainID strin
 	// Check old voting power.
 	oldVotingPower := int64(0)
 	seen := map[int]bool{}
-	round := commit.Round()
+	baseVote := Vote{
+		Height:  height,
+		Round:   commit.Round(),
+		Type:    VoteTypePrecommit,
+		BlockID: blockID,
+	}
 
 	for idx, precommit := range commit.Precommits {
 		if precommit == nil {
 			continue
 		}
-		if precommit.Height != height {
-			return cmn.NewError("Blocks don't match - %d vs %d", round, precommit.Round)
-		}
-		if precommit.Round != round {
-			return cmn.NewError("Invalid commit -- wrong round: %v vs %v", round, precommit.Round)
-		}
-		if precommit.Type != VoteTypePrecommit {
-			return cmn.NewError("Invalid commit -- not precommit @ index %v", idx)
-		}
 		// See if this validator is in oldVals.
-		idx, val := oldVals.GetByAddress(precommit.ValidatorAddress)
+		adr, _ := newSet.GetByIndex(idx)
+		idx, val := oldVals.GetByAddress(adr)
 		if val == nil || seen[idx] {
 			continue // missing or double vote...
 		}
 		seen[idx] = true
 
 		// Validate signature.
-		precommitSignBytes := precommit.SignBytes(chainID)
+		baseVote.Timestamp = precommit.Timestamp
+		precommitSignBytes := baseVote.SignBytes(chainID)
 		if !val.PubKey.VerifyBytes(precommitSignBytes, precommit.Signature) {
 			return cmn.NewError("Invalid commit -- invalid signature: %v", precommit)
 		}
 		// Good precommit!
-		if blockID.Equals(precommit.BlockID) {
-			oldVotingPower += val.VotingPower
-		} else {
-			// It's OK that the BlockID doesn't match.  We include stray
-			// precommits to measure validator availability.
-		}
+		oldVotingPower += val.VotingPower
 	}
 
 	if oldVotingPower <= oldVals.TotalVotingPower()*2/3 {
diff --git a/types/validator_set_test.go b/types/validator_set_test.go
index ad9a2b00..39967fc8 100644
--- a/types/validator_set_test.go
+++ b/types/validator_set_test.go
@@ -392,8 +392,15 @@ func TestValidatorSetVerifyCommit(t *testing.T) {
 	assert.NoError(t, err)
 	vote.Signature = sig
 	commit := &Commit{
-		BlockID:    blockID,
-		Precommits: []*Vote{vote},
+		BlockID: blockID,
+		Precommits: []*CommitSig{
+			&CommitSig{
+				Signature: sig,
+				Timestamp: vote.Timestamp,
+			},
+		},
+		HeightNum: height,
+		RoundNum:  0,
 	}
 
 	badChainID := "notmychainID"
@@ -401,7 +408,9 @@ func TestValidatorSetVerifyCommit(t *testing.T) {
 	badHeight := height + 1
 	badCommit := &Commit{
 		BlockID:    blockID,
-		Precommits: []*Vote{nil},
+		Precommits: []*CommitSig{nil},
+		HeightNum:  height,
+		RoundNum:   0,
 	}
 
 	// test some error cases
diff --git a/types/vote_set.go b/types/vote_set.go
index dbcacbbd..02466ec0 100644
--- a/types/vote_set.go
+++ b/types/vote_set.go
@@ -543,9 +543,20 @@ func (voteSet *VoteSet) MakeCommit() *Commit {
 	// For every validator, get the precommit
 	votesCopy := make([]*Vote, len(voteSet.votes))
 	copy(votesCopy, voteSet.votes)
+	precommits := make([]*CommitSig, len(voteSet.votes))
+	for i, v := range votesCopy {
+		if v != nil {
+			precommits[i] = &CommitSig{
+				Signature: v.Signature,
+				Timestamp: v.Timestamp,
+			}
+		}
+	}
 	return &Commit{
 		BlockID:    *voteSet.maj23,
-		Precommits: votesCopy,
+		Precommits: precommits,
+		RoundNum:   voteSet.round,
+		HeightNum:  voteSet.height,
 	}
 }