diff --git a/node/modules/storageminer.go b/node/modules/storageminer.go
index f4b59d344..f12962683 100644
--- a/node/modules/storageminer.go
+++ b/node/modules/storageminer.go
@@ -218,7 +218,7 @@ func StorageMiner(fc config.MinerFeeConfig) func(params StorageMinerParams) (*st
 
 		ctx := helpers.LifecycleCtx(mctx, lc)
 
-		fps, err := storage.NewWindowedPoStScheduler(api, fc, as, sealer, sealer, j, maddr)
+		fps, err := storage.NewWindowedPoStScheduler(api, fc, as, sealer, verif, sealer, j, maddr)
 		if err != nil {
 			return nil, err
 		}
diff --git a/storage/wdpost_run.go b/storage/wdpost_run.go
index 346ffc38d..c80617558 100644
--- a/storage/wdpost_run.go
+++ b/storage/wdpost_run.go
@@ -20,6 +20,7 @@ import (
 	"golang.org/x/xerrors"
 
 	proof2 "github.com/filecoin-project/specs-actors/v2/actors/runtime/proof"
+	"github.com/filecoin-project/specs-actors/v3/actors/runtime/proof"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
@@ -594,10 +595,26 @@ func (s *WindowPoStScheduler) runPost(ctx context.Context, di dline.Info, ts *ty
 			log.Infow("computing window post", "batch", batchIdx, "elapsed", elapsed)
 
 			if err == nil {
+				// If we proved nothing, something is very wrong.
 				if len(postOut) == 0 {
 					return nil, xerrors.Errorf("received no proofs back from generate window post")
 				}
 
+				// If we generated an incorrect proof, try again.
+				if correct, err := s.verifier.VerifyWindowPoSt(ctx, proof.WindowPoStVerifyInfo{
+					Randomness:        abi.PoStRandomness(rand),
+					Proofs:            postOut,
+					ChallengedSectors: sinfos,
+					Prover:            abi.ActorID(mid),
+				}); err != nil {
+					log.Errorw("window post verification failed", "post", postOut, "error", err)
+					time.Sleep(5 * time.Second)
+					continue
+				} else if !correct {
+					log.Errorw("generated incorrect window post proof", "post", postOut, "error", err)
+					continue
+				}
+
 				// Proof generation successful, stop retrying
 				somethingToProve = true
 				params.Partitions = partitions
diff --git a/storage/wdpost_run_test.go b/storage/wdpost_run_test.go
index e4c24ad3e..80bd8d3fb 100644
--- a/storage/wdpost_run_test.go
+++ b/storage/wdpost_run_test.go
@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
+	"golang.org/x/xerrors"
 
 	"github.com/ipfs/go-cid"
 
@@ -123,6 +124,34 @@ func (m *mockProver) GenerateWindowPoSt(ctx context.Context, aid abi.ActorID, si
 	}, nil, nil
 }
 
+type mockVerif struct {
+}
+
+func (m mockVerif) VerifyWinningPoSt(ctx context.Context, info proof2.WinningPoStVerifyInfo) (bool, error) {
+	panic("implement me")
+}
+
+func (m mockVerif) VerifyWindowPoSt(ctx context.Context, info proof2.WindowPoStVerifyInfo) (bool, error) {
+	if len(info.Proofs) != 1 {
+		return false, xerrors.Errorf("expected 1 proof entry")
+	}
+
+	proof := info.Proofs[0]
+
+	if !bytes.Equal(proof.ProofBytes, []byte("post-proof")) {
+		return false, xerrors.Errorf("bad proof")
+	}
+	return true, nil
+}
+
+func (m mockVerif) VerifySeal(proof2.SealVerifyInfo) (bool, error) {
+	panic("implement me")
+}
+
+func (m mockVerif) GenerateWinningPoStSectorChallenge(context.Context, abi.RegisteredPoStProof, abi.ActorID, abi.PoStRandomness, uint64) ([]uint64, error) {
+	panic("implement me")
+}
+
 type mockFaultTracker struct {
 }
 
@@ -176,6 +205,7 @@ func TestWDPostDoPost(t *testing.T) {
 	scheduler := &WindowPoStScheduler{
 		api:          mockStgMinerAPI,
 		prover:       &mockProver{},
+		verifier:     &mockVerif{},
 		faultTracker: &mockFaultTracker{},
 		proofType:    proofType,
 		actor:        postAct,
diff --git a/storage/wdpost_sched.go b/storage/wdpost_sched.go
index 3d6073a63..8c24a5516 100644
--- a/storage/wdpost_sched.go
+++ b/storage/wdpost_sched.go
@@ -16,6 +16,7 @@ import (
 	"github.com/filecoin-project/lotus/chain/store"
 	"github.com/filecoin-project/lotus/chain/types"
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
+	"github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper"
 	"github.com/filecoin-project/lotus/journal"
 	"github.com/filecoin-project/lotus/node/config"
 
@@ -27,6 +28,7 @@ type WindowPoStScheduler struct {
 	feeCfg           config.MinerFeeConfig
 	addrSel          *AddressSelector
 	prover           storage.Prover
+	verifier         ffiwrapper.Verifier
 	faultTracker     sectorstorage.FaultTracker
 	proofType        abi.RegisteredPoStProof
 	partitionSectors uint64
@@ -41,7 +43,7 @@ type WindowPoStScheduler struct {
 	// failLk sync.Mutex
 }
 
-func NewWindowedPoStScheduler(api storageMinerApi, fc config.MinerFeeConfig, as *AddressSelector, sb storage.Prover, ft sectorstorage.FaultTracker, j journal.Journal, actor address.Address) (*WindowPoStScheduler, error) {
+func NewWindowedPoStScheduler(api storageMinerApi, fc config.MinerFeeConfig, as *AddressSelector, sb storage.Prover, verif ffiwrapper.Verifier, ft sectorstorage.FaultTracker, j journal.Journal, actor address.Address) (*WindowPoStScheduler, error) {
 	mi, err := api.StateMinerInfo(context.TODO(), actor, types.EmptyTSK)
 	if err != nil {
 		return nil, xerrors.Errorf("getting sector size: %w", err)
@@ -52,6 +54,7 @@ func NewWindowedPoStScheduler(api storageMinerApi, fc config.MinerFeeConfig, as
 		feeCfg:           fc,
 		addrSel:          as,
 		prover:           sb,
+		verifier:         verif,
 		faultTracker:     ft,
 		proofType:        mi.WindowPoStProofType,
 		partitionSectors: mi.WindowPoStPartitionSectors,