diff --git a/chain/actors/builtin/miner/cbor_gen.go b/chain/actors/builtin/miner/cbor_gen.go
new file mode 100644
index 000000000..16819d5c4
--- /dev/null
+++ b/chain/actors/builtin/miner/cbor_gen.go
@@ -0,0 +1,313 @@
+// Code generated by github.com/whyrusleeping/cbor-gen. DO NOT EDIT.
+
+package miner
+
+import (
+	"fmt"
+	"io"
+
+	abi "github.com/filecoin-project/go-state-types/abi"
+	cbg "github.com/whyrusleeping/cbor-gen"
+	xerrors "golang.org/x/xerrors"
+)
+
+var _ = xerrors.Errorf
+
+var lengthBufSectorOnChainInfo = []byte{139}
+
+func (t *SectorOnChainInfo) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+	if _, err := w.Write(lengthBufSectorOnChainInfo); err != nil {
+		return err
+	}
+
+	scratch := make([]byte, 9)
+
+	// t.SectorNumber (abi.SectorNumber) (uint64)
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajUnsignedInt, uint64(t.SectorNumber)); err != nil {
+		return err
+	}
+
+	// t.SealProof (abi.RegisteredSealProof) (int64)
+	if t.SealProof >= 0 {
+		if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajUnsignedInt, uint64(t.SealProof)); err != nil {
+			return err
+		}
+	} else {
+		if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajNegativeInt, uint64(-t.SealProof-1)); err != nil {
+			return err
+		}
+	}
+
+	// t.SealedCID (cid.Cid) (struct)
+
+	if err := cbg.WriteCidBuf(scratch, w, t.SealedCID); err != nil {
+		return xerrors.Errorf("failed to write cid field t.SealedCID: %w", err)
+	}
+
+	// t.DealIDs ([]abi.DealID) (slice)
+	if len(t.DealIDs) > cbg.MaxLength {
+		return xerrors.Errorf("Slice value in field t.DealIDs was too long")
+	}
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajArray, uint64(len(t.DealIDs))); err != nil {
+		return err
+	}
+	for _, v := range t.DealIDs {
+		if err := cbg.CborWriteHeader(w, cbg.MajUnsignedInt, uint64(v)); err != nil {
+			return err
+		}
+	}
+
+	// t.Activation (abi.ChainEpoch) (int64)
+	if t.Activation >= 0 {
+		if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajUnsignedInt, uint64(t.Activation)); err != nil {
+			return err
+		}
+	} else {
+		if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajNegativeInt, uint64(-t.Activation-1)); err != nil {
+			return err
+		}
+	}
+
+	// t.Expiration (abi.ChainEpoch) (int64)
+	if t.Expiration >= 0 {
+		if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajUnsignedInt, uint64(t.Expiration)); err != nil {
+			return err
+		}
+	} else {
+		if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajNegativeInt, uint64(-t.Expiration-1)); err != nil {
+			return err
+		}
+	}
+
+	// t.DealWeight (big.Int) (struct)
+	if err := t.DealWeight.MarshalCBOR(w); err != nil {
+		return err
+	}
+
+	// t.VerifiedDealWeight (big.Int) (struct)
+	if err := t.VerifiedDealWeight.MarshalCBOR(w); err != nil {
+		return err
+	}
+
+	// t.InitialPledge (big.Int) (struct)
+	if err := t.InitialPledge.MarshalCBOR(w); err != nil {
+		return err
+	}
+
+	// t.ExpectedDayReward (big.Int) (struct)
+	if err := t.ExpectedDayReward.MarshalCBOR(w); err != nil {
+		return err
+	}
+
+	// t.ExpectedStoragePledge (big.Int) (struct)
+	if err := t.ExpectedStoragePledge.MarshalCBOR(w); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (t *SectorOnChainInfo) UnmarshalCBOR(r io.Reader) error {
+	*t = SectorOnChainInfo{}
+
+	br := cbg.GetPeeker(r)
+	scratch := make([]byte, 8)
+
+	maj, extra, err := cbg.CborReadHeaderBuf(br, scratch)
+	if err != nil {
+		return err
+	}
+	if maj != cbg.MajArray {
+		return fmt.Errorf("cbor input should be of type array")
+	}
+
+	if extra != 11 {
+		return fmt.Errorf("cbor input had wrong number of fields")
+	}
+
+	// t.SectorNumber (abi.SectorNumber) (uint64)
+
+	{
+
+		maj, extra, err = cbg.CborReadHeaderBuf(br, scratch)
+		if err != nil {
+			return err
+		}
+		if maj != cbg.MajUnsignedInt {
+			return fmt.Errorf("wrong type for uint64 field")
+		}
+		t.SectorNumber = abi.SectorNumber(extra)
+
+	}
+	// t.SealProof (abi.RegisteredSealProof) (int64)
+	{
+		maj, extra, err := cbg.CborReadHeaderBuf(br, scratch)
+		var extraI int64
+		if err != nil {
+			return err
+		}
+		switch maj {
+		case cbg.MajUnsignedInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 positive overflow")
+			}
+		case cbg.MajNegativeInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 negative oveflow")
+			}
+			extraI = -1 - extraI
+		default:
+			return fmt.Errorf("wrong type for int64 field: %d", maj)
+		}
+
+		t.SealProof = abi.RegisteredSealProof(extraI)
+	}
+	// t.SealedCID (cid.Cid) (struct)
+
+	{
+
+		c, err := cbg.ReadCid(br)
+		if err != nil {
+			return xerrors.Errorf("failed to read cid field t.SealedCID: %w", err)
+		}
+
+		t.SealedCID = c
+
+	}
+	// t.DealIDs ([]abi.DealID) (slice)
+
+	maj, extra, err = cbg.CborReadHeaderBuf(br, scratch)
+	if err != nil {
+		return err
+	}
+
+	if extra > cbg.MaxLength {
+		return fmt.Errorf("t.DealIDs: array too large (%d)", extra)
+	}
+
+	if maj != cbg.MajArray {
+		return fmt.Errorf("expected cbor array")
+	}
+
+	if extra > 0 {
+		t.DealIDs = make([]abi.DealID, extra)
+	}
+
+	for i := 0; i < int(extra); i++ {
+
+		maj, val, err := cbg.CborReadHeaderBuf(br, scratch)
+		if err != nil {
+			return xerrors.Errorf("failed to read uint64 for t.DealIDs slice: %w", err)
+		}
+
+		if maj != cbg.MajUnsignedInt {
+			return xerrors.Errorf("value read for array t.DealIDs was not a uint, instead got %d", maj)
+		}
+
+		t.DealIDs[i] = abi.DealID(val)
+	}
+
+	// t.Activation (abi.ChainEpoch) (int64)
+	{
+		maj, extra, err := cbg.CborReadHeaderBuf(br, scratch)
+		var extraI int64
+		if err != nil {
+			return err
+		}
+		switch maj {
+		case cbg.MajUnsignedInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 positive overflow")
+			}
+		case cbg.MajNegativeInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 negative oveflow")
+			}
+			extraI = -1 - extraI
+		default:
+			return fmt.Errorf("wrong type for int64 field: %d", maj)
+		}
+
+		t.Activation = abi.ChainEpoch(extraI)
+	}
+	// t.Expiration (abi.ChainEpoch) (int64)
+	{
+		maj, extra, err := cbg.CborReadHeaderBuf(br, scratch)
+		var extraI int64
+		if err != nil {
+			return err
+		}
+		switch maj {
+		case cbg.MajUnsignedInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 positive overflow")
+			}
+		case cbg.MajNegativeInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 negative oveflow")
+			}
+			extraI = -1 - extraI
+		default:
+			return fmt.Errorf("wrong type for int64 field: %d", maj)
+		}
+
+		t.Expiration = abi.ChainEpoch(extraI)
+	}
+	// t.DealWeight (big.Int) (struct)
+
+	{
+
+		if err := t.DealWeight.UnmarshalCBOR(br); err != nil {
+			return xerrors.Errorf("unmarshaling t.DealWeight: %w", err)
+		}
+
+	}
+	// t.VerifiedDealWeight (big.Int) (struct)
+
+	{
+
+		if err := t.VerifiedDealWeight.UnmarshalCBOR(br); err != nil {
+			return xerrors.Errorf("unmarshaling t.VerifiedDealWeight: %w", err)
+		}
+
+	}
+	// t.InitialPledge (big.Int) (struct)
+
+	{
+
+		if err := t.InitialPledge.UnmarshalCBOR(br); err != nil {
+			return xerrors.Errorf("unmarshaling t.InitialPledge: %w", err)
+		}
+
+	}
+	// t.ExpectedDayReward (big.Int) (struct)
+
+	{
+
+		if err := t.ExpectedDayReward.UnmarshalCBOR(br); err != nil {
+			return xerrors.Errorf("unmarshaling t.ExpectedDayReward: %w", err)
+		}
+
+	}
+	// t.ExpectedStoragePledge (big.Int) (struct)
+
+	{
+
+		if err := t.ExpectedStoragePledge.UnmarshalCBOR(br); err != nil {
+			return xerrors.Errorf("unmarshaling t.ExpectedStoragePledge: %w", err)
+		}
+
+	}
+	return nil
+}
diff --git a/chain/actors/builtin/miner/v0.go b/chain/actors/builtin/miner/v0.go
index 71306fafd..6d4e7c589 100644
--- a/chain/actors/builtin/miner/v0.go
+++ b/chain/actors/builtin/miner/v0.go
@@ -165,26 +165,50 @@ func (s *state0) LoadSectorsFromSet(filter *bitfield.BitField, filterOut bool) (
 		return nil, err
 	}
 
-	if filter != nil {
-		var v cbg.Deferred
-		if err := a.ForEach(&v, func(i int64) error {
+	ret := adt0.MakeEmptyArray(s.store)
+	var v cbg.Deferred
+	if err := a.ForEach(&v, func(i int64) error {
+		include := true
+		if filter != nil {
 			set, err := filter.IsSet(uint64(i))
 			if err != nil {
 				return xerrors.Errorf("filter check error: %w", err)
 			}
 			if set == filterOut {
-				err = a.Delete(uint64(i))
-				if err != nil {
-					return xerrors.Errorf("filtering error: %w", err)
-				}
+				include = false
 			}
-			return nil
-		}); err != nil {
-			return nil, err
 		}
+
+		if include {
+			var oci miner0.SectorOnChainInfo
+			if err := oci.UnmarshalCBOR(bytes.NewReader(v.Raw)); err != nil {
+				return err
+			}
+
+			noci := SectorOnChainInfo{
+				SectorNumber:          oci.SectorNumber,
+				SealProof:             oci.SealProof,
+				SealedCID:             oci.SealedCID,
+				DealIDs:               oci.DealIDs,
+				Activation:            oci.Activation,
+				Expiration:            oci.Expiration,
+				DealWeight:            oci.DealWeight,
+				VerifiedDealWeight:    oci.VerifiedDealWeight,
+				InitialPledge:         oci.InitialPledge,
+				ExpectedDayReward:     oci.ExpectedDayReward,
+				ExpectedStoragePledge: oci.ExpectedStoragePledge,
+			}
+
+			if err := ret.Set(uint64(i), &noci); err != nil {
+				return err
+			}
+		}
+		return nil
+	}); err != nil {
+		return nil, err
 	}
 
-	return a, nil
+	return ret, nil
 }
 
 func (s *state0) LoadPreCommittedSectors() (adt.Map, error) {
diff --git a/chain/stmgr/utils.go b/chain/stmgr/utils.go
index 203d49490..20d7bd54f 100644
--- a/chain/stmgr/utils.go
+++ b/chain/stmgr/utils.go
@@ -169,7 +169,7 @@ func GetMinerSectorSet(ctx context.Context, sm *StateManager, ts *types.TipSet,
 	var sset []*miner.ChainSectorInfo
 	var v cbg.Deferred
 	if err := sectors.ForEach(&v, func(i int64) error {
-		var oci miner0.SectorOnChainInfo
+		var oci miner.SectorOnChainInfo
 		if err := oci.UnmarshalCBOR(bytes.NewReader(v.Raw)); err != nil {
 			return err
 		}
diff --git a/gen/main.go b/gen/main.go
index be227663c..90b24e3a7 100644
--- a/gen/main.go
+++ b/gen/main.go
@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+
 	gen "github.com/whyrusleeping/cbor-gen"
 
 	"github.com/filecoin-project/lotus/api"
@@ -76,4 +78,11 @@ func main() {
 		os.Exit(1)
 	}
 
+	err = gen.WriteTupleEncodersToFile("./chain/actors/builtin/miner/cbor_gen.go", "miner",
+		miner.SectorOnChainInfo{},
+	)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
 }