diff --git a/storagemarket/impl/client_states.go b/storagemarket/impl/client_states.go
index 46f8d7e8..6c0f52f9 100644
--- a/storagemarket/impl/client_states.go
+++ b/storagemarket/impl/client_states.go
@@ -76,7 +76,7 @@ func (c *Client) staged(ctx context.Context, deal ClientDeal) (func(*ClientDeal)
 }
 
 func (c *Client) sealing(ctx context.Context, deal ClientDeal) (func(*ClientDeal), error) {
-	cb := func(err error) {
+	cb := func(_ uint64, err error) {
 		select {
 		case c.updated <- clientDealUpdate{
 			newState: storagemarket.StorageDealActive,
diff --git a/storagemarket/impl/provider_states.go b/storagemarket/impl/provider_states.go
index 971bbe93..148adcc7 100644
--- a/storagemarket/impl/provider_states.go
+++ b/storagemarket/impl/provider_states.go
@@ -177,7 +177,7 @@ func (p *Provider) staged(ctx context.Context, deal MinerDeal) (func(*MinerDeal)
 		return nil, err
 	}
 	paddedReader, paddedSize := padreader.NewPaddedReader(file, uint64(file.Size()))
-	sectorID, err := p.spn.OnDealComplete(
+	err = p.spn.OnDealComplete(
 		ctx,
 		storagemarket.MinerDeal{
 			Client:      deal.Client,
@@ -191,25 +191,22 @@ func (p *Provider) staged(ctx context.Context, deal MinerDeal) (func(*MinerDeal)
 		paddedReader,
 	)
 
-	if err != nil {
-		return nil, err
-	}
-
-	return func(deal *MinerDeal) {
-		deal.SectorID = sectorID
-	}, nil
+	return nil, err
 }
 
 // SEALING
 
 func (p *Provider) sealing(ctx context.Context, deal MinerDeal) (func(*MinerDeal), error) {
 	// TODO: consider waiting for seal to happen
-	cb := func(err error) {
+	cb := func(sectorId uint64, err error) {
 		select {
 		case p.updated <- minerDealUpdate{
 			newState: storagemarket.StorageDealActive,
 			id:       deal.ProposalCid,
 			err:      err,
+			mut: func(deal *MinerDeal) {
+				deal.SectorID = sectorId
+			},
 		}:
 		case <-p.stop:
 		}
diff --git a/storagemarket/types.go b/storagemarket/types.go
index be976d81..3ab6161b 100644
--- a/storagemarket/types.go
+++ b/storagemarket/types.go
@@ -231,8 +231,7 @@ type StorageProviderNode interface {
 	ListProviderDeals(ctx context.Context, addr address.Address) ([]StorageDeal, error)
 
 	// Called when a deal is complete and on chain, and data has been transferred and is ready to be added to a sector
-	// returns sector id
-	OnDealComplete(ctx context.Context, deal MinerDeal, pieceSize uint64, pieceReader io.Reader) (uint64, error)
+	OnDealComplete(ctx context.Context, deal MinerDeal, pieceSize uint64, pieceReader io.Reader) error
 
 	// returns the worker address associated with a miner
 	GetMinerWorker(ctx context.Context, miner address.Address) (address.Address, error)
@@ -245,7 +244,7 @@ type StorageProviderNode interface {
 	LocatePieceForDealWithinSector(ctx context.Context, dealID uint64) (sectorID uint64, offset uint64, length uint64, err error)
 }
 
-type DealSectorCommittedCallback func(error)
+type DealSectorCommittedCallback func(sectorId uint64, err error)
 
 // Node dependencies for a StorageClient
 type StorageClientNode interface {