diff --git a/chain/consensus/compute_state.go b/chain/consensus/compute_state.go
index d0f669a10..041b6fb03 100644
--- a/chain/consensus/compute_state.go
+++ b/chain/consensus/compute_state.go
@@ -200,16 +200,12 @@ func (t *TipSetExecutor) ApplyBlocks(ctx context.Context,
 			processedMsgs[m.Cid()] = struct{}{}
 		}
 
-		params, err := actors.SerializeParams(&reward.AwardBlockRewardParams{
+		params := &reward.AwardBlockRewardParams{
 			Miner:     b.Miner,
 			Penalty:   penalty,
 			GasReward: gasReward,
 			WinCount:  b.WinCount,
-		})
-		if err != nil {
-			return cid.Undef, cid.Undef, xerrors.Errorf("failed to serialize award params: %w", err)
 		}
-
 		rErr := t.reward(ctx, vmi, em, epoch, ts, params)
 		if rErr != nil {
 			return cid.Undef, cid.Undef, xerrors.Errorf("error applying reward: %w", err)
diff --git a/chain/consensus/filcns/filecoin.go b/chain/consensus/filcns/filecoin.go
index 543dc5c68..2e3baa4db 100644
--- a/chain/consensus/filcns/filecoin.go
+++ b/chain/consensus/filcns/filecoin.go
@@ -21,6 +21,7 @@ import (
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain"
+	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/builtin"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/power"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/reward"
@@ -59,7 +60,11 @@ type FilecoinEC struct {
 const MaxHeightDrift = 5
 
 var RewardFunc = func(ctx context.Context, vmi vm.Interface, em stmgr.ExecMonitor,
-	epoch abi.ChainEpoch, ts *types.TipSet, params []byte) error {
+	epoch abi.ChainEpoch, ts *types.TipSet, params *reward.AwardBlockRewardParams) error {
+	ser, err := actors.SerializeParams(params)
+	if err != nil {
+		return xerrors.Errorf("failed to serialize award params: %w", err)
+	}
 	rwMsg := &types.Message{
 		From:       builtin.SystemActorAddr,
 		To:         reward.Address,
@@ -69,7 +74,7 @@ var RewardFunc = func(ctx context.Context, vmi vm.Interface, em stmgr.ExecMonito
 		GasPremium: types.NewInt(0),
 		GasLimit:   1 << 30,
 		Method:     reward.Methods.AwardBlockReward,
-		Params:     params,
+		Params:     ser,
 	}
 	ret, actErr := vmi.ApplyImplicitMessage(ctx, rwMsg)
 	if actErr != nil {
diff --git a/chain/consensus/iface.go b/chain/consensus/iface.go
index 58adfe03e..10c3ead74 100644
--- a/chain/consensus/iface.go
+++ b/chain/consensus/iface.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/reward"
 	"github.com/filecoin-project/lotus/chain/stmgr"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/chain/vm"
@@ -47,7 +48,7 @@ type Consensus interface {
 //
 // Each consensus implementation can set their own reward function.
 type RewardFunc func(ctx context.Context, vmi vm.Interface, em stmgr.ExecMonitor,
-	epoch abi.ChainEpoch, ts *types.TipSet, params []byte) error
+	epoch abi.ChainEpoch, ts *types.TipSet, params *reward.AwardBlockRewardParams) error
 
 // ValidateBlockPubsub implements the common checks performed by all consensus implementations
 // when a block is received through the pubsub channel.