diff --git a/extern/filecoin-ffi b/extern/filecoin-ffi
index 1bff7f456..5bb4a309b 160000
--- a/extern/filecoin-ffi
+++ b/extern/filecoin-ffi
@@ -1 +1 @@
-Subproject commit 1bff7f4563370ada590a605b5459b91e1662ebaa
+Subproject commit 5bb4a309bce9d446ac618f34a8b9e2883af2002f
diff --git a/ffiwrapper/sealer_test.go b/ffiwrapper/sealer_test.go
index 1cb1ac9ce..7c1ad0474 100644
--- a/ffiwrapper/sealer_test.go
+++ b/ffiwrapper/sealer_test.go
@@ -91,7 +91,7 @@ func (s *seal) commit(t *testing.T, sb *Sealer, done func()) {
 	ok, err := ProofVerifier.VerifySeal(abi.SealVerifyInfo{
 		SectorID:              s.id,
 		SealedCID:             s.cids.Sealed,
-		SealProof:       sealProofType,
+		SealProof:             sealProofType,
 		Proof:                 proof,
 		Randomness:            s.ticket,
 		InteractiveRandomness: seed,
diff --git a/ffiwrapper/verifier_cgo.go b/ffiwrapper/verifier_cgo.go
index a699ee10c..e3e8dd886 100644
--- a/ffiwrapper/verifier_cgo.go
+++ b/ffiwrapper/verifier_cgo.go
@@ -15,7 +15,7 @@ import (
 )
 
 func (sb *Sealer) GenerateWinningPoSt(ctx context.Context, minerID abi.ActorID, sectorInfo []abi.SectorInfo, randomness abi.PoStRandomness) ([]abi.PoStProof, error) {
-	randomness[31] = 0                                                                                                                   // TODO: Not correct, fixme
+	randomness[31] = 0                                                                                                                       // TODO: Not correct, fixme
 	privsectors, skipped, done, err := sb.pubSectorToPriv(ctx, minerID, sectorInfo, nil, abi.RegisteredSealProof.RegisteredWinningPoStProof) // TODO: FAULTS?
 	if err != nil {
 		return nil, err
diff --git a/mock/mock.go b/mock/mock.go
index 0d61e69de..eae17bd3c 100644
--- a/mock/mock.go
+++ b/mock/mock.go
@@ -278,7 +278,7 @@ func generateFakePoSt(sectorInfo []abi.SectorInfo, rpt func(abi.RegisteredSealPr
 	return []abi.PoStProof{
 		{
 			PoStProof:  wp,
-			ProofBytes:      make([]byte, 192*int(math.Ceil(float64(len(sectorInfo))/float64(se)))),
+			ProofBytes: make([]byte, 192*int(math.Ceil(float64(len(sectorInfo))/float64(se)))),
 		},
 	}
 }
@@ -319,7 +319,7 @@ func (mgr *SectorMgr) FinalizeSector(context.Context, abi.SectorID) error {
 	return nil
 }
 
-func (mgr *SectorMgr) CheckProvable(context.Context, abi.RegisteredProof, []abi.SectorID) ([]abi.SectorID, error) {
+func (mgr *SectorMgr) CheckProvable(context.Context, abi.RegisteredSealProof, []abi.SectorID) ([]abi.SectorID, error) {
 	return nil, nil
 }