diff --git a/miner/miner.go b/miner/miner.go
index f2468a91153..cabf26ecdc4 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -150,6 +150,8 @@ func (m *Miner) mine(ctx context.Context) {
 	ctx, span := trace.StartSpan(ctx, "/mine")
 	defer span.End()
 
+	go m.doWinPoStWarmup(ctx)
+
 	var lastBase MiningBase
 minerLoop:
 	for {
diff --git a/miner/warmup.go b/miner/warmup.go
new file mode 100644
index 00000000000..d0b8c5b3511
--- /dev/null
+++ b/miner/warmup.go
@@ -0,0 +1,82 @@
+package miner
+
+import (
+	"context"
+	"crypto/rand"
+	"math"
+	"time"
+
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/go-bitfield"
+	"github.com/filecoin-project/go-state-types/abi"
+
+	proof2 "github.com/filecoin-project/specs-actors/v2/actors/runtime/proof"
+
+	"github.com/filecoin-project/lotus/chain/types"
+)
+
+func (m *Miner) winPoStWarmup(ctx context.Context) error {
+	deadlines, err := m.api.StateMinerDeadlines(ctx, m.address, types.EmptyTSK)
+	if err != nil {
+		return xerrors.Errorf("getting deadlines: %w", err)
+	}
+
+	var sector abi.SectorNumber = math.MaxUint64
+
+	for dlIdx := range deadlines {
+		partitions, err := m.api.StateMinerPartitions(ctx, m.address, uint64(dlIdx), types.EmptyTSK)
+		if err != nil {
+			return xerrors.Errorf("getting partitions for deadline %d: %w", dlIdx, err)
+		}
+
+		for _, partition := range partitions {
+			b, err := partition.ActiveSectors.First()
+			if err == bitfield.ErrNoBitsSet {
+				continue
+			}
+			if err != nil {
+				return err
+			}
+
+			sector = abi.SectorNumber(b)
+		}
+	}
+
+	if sector == math.MaxUint64 {
+		log.Info("skipping winning PoSt warmup, no sectors")
+		return nil
+	}
+
+	log.Infow("starting winning PoSt warmup", "sector", sector)
+	start := time.Now()
+
+	var r abi.PoStRandomness = make([]byte, abi.RandomnessLength)
+	_, _ = rand.Read(r)
+
+	si, err := m.api.StateSectorGetInfo(ctx, m.address, sector, types.EmptyTSK)
+	if err != nil {
+		return xerrors.Errorf("getting sector info: %w", err)
+	}
+
+	_, err = m.epp.ComputeProof(ctx, []proof2.SectorInfo{
+		{
+			SealProof:    si.SealProof,
+			SectorNumber: sector,
+			SealedCID:    si.SealedCID,
+		},
+	}, r)
+	if err != nil {
+		return xerrors.Errorf("failed to compute proof: %w", err)
+	}
+
+	log.Infow("winning PoSt warmup successful", "took", time.Now().Sub(start))
+	return nil
+}
+
+func (m *Miner) doWinPoStWarmup(ctx context.Context) {
+	err := m.winPoStWarmup(ctx)
+	if err != nil {
+		log.Errorw("winning PoSt warmup failed", "error", err)
+	}
+}