diff --git a/state/execution.go b/state/execution.go
index cba139963..b989e0291 100644
--- a/state/execution.go
+++ b/state/execution.go
@@ -242,7 +242,7 @@ func (s *State) MakeBlock(height int64, txs []types.Tx, commit *types.Commit) (*
 	block.LastBlockID = s.LastBlockID
 	block.ValidatorsHash = s.Validators.Hash()
 	block.AppHash = s.AppHash
-	block.ConsensusHash = s.LastConsensusParams.Hash()
+	block.ConsensusHash = s.ConsensusParams.Hash()
 	block.LastResultsHash = s.LastResultsHash
 
 	return block, block.MakePartSet(s.ConsensusParams.BlockGossip.BlockPartSizeBytes)
@@ -279,8 +279,8 @@ func (s *State) validateBlock(b *types.Block) error {
 	if !bytes.Equal(b.AppHash, s.AppHash) {
 		return fmt.Errorf("Wrong Block.Header.AppHash.  Expected %X, got %v", s.AppHash, b.AppHash)
 	}
-	if !bytes.Equal(b.ConsensusHash, s.LastConsensusParams.Hash()) {
-		return fmt.Errorf("Wrong Block.Header.ConsensusHash.  Expected %X, got %v", s.LastConsensusParams.Hash(), b.ConsensusHash)
+	if !bytes.Equal(b.ConsensusHash, s.ConsensusParams.Hash()) {
+		return fmt.Errorf("Wrong Block.Header.ConsensusHash.  Expected %X, got %v", s.ConsensusParams.Hash(), b.ConsensusHash)
 	}
 	if !bytes.Equal(b.LastResultsHash, s.LastResultsHash) {
 		return fmt.Errorf("Wrong Block.Header.LastResultsHash.  Expected %X, got %v", s.LastResultsHash, b.LastResultsHash)
diff --git a/state/state.go b/state/state.go
index 164718226..0dd105cbe 100644
--- a/state/state.go
+++ b/state/state.go
@@ -71,7 +71,6 @@ type State struct {
 	// Consensus parameters used for validating blocks.
 	// Changes returned by EndBlock and updated after Commit.
 	ConsensusParams                  types.ConsensusParams
-	LastConsensusParams              types.ConsensusParams
 	LastHeightConsensusParamsChanged int64
 
 	// Merkle root of the results from executing prev block
@@ -146,7 +145,6 @@ func (s *State) Copy() *State {
 		LastHeightValidatorsChanged: s.LastHeightValidatorsChanged,
 
 		ConsensusParams:                  s.ConsensusParams,
-		LastConsensusParams:              s.LastConsensusParams,
 		LastHeightConsensusParamsChanged: s.LastHeightConsensusParamsChanged,
 
 		AppHash: s.AppHash,
@@ -374,7 +372,6 @@ func (s *State) setBlockAndValidators(height int64,
 	s.LastValidators = s.Validators.Copy()
 	s.Validators = valSet
 
-	s.LastConsensusParams = s.ConsensusParams
 	s.ConsensusParams = params
 
 	s.LastResultsHash = resultsHash
@@ -501,7 +498,6 @@ func MakeGenesisState(db dbm.DB, genDoc *types.GenesisDoc) (*State, error) {
 		LastHeightValidatorsChanged: 1,
 
 		ConsensusParams:                  *genDoc.ConsensusParams,
-		LastConsensusParams:              types.ConsensusParams{},
 		LastHeightConsensusParamsChanged: 1,
 
 		AppHash: genDoc.AppHash,