diff --git a/chain/gen/genesis/miners.go b/chain/gen/genesis/miners.go
index 01d962a8f..8ca3a0423 100644
--- a/chain/gen/genesis/miners.go
+++ b/chain/gen/genesis/miners.go
@@ -159,6 +159,7 @@ func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sroot cid.Cid
 			{
 				params := &market.VerifyDealsOnSectorProveCommitParams{
 					DealIDs:      []abi.DealID{dealIDs[pi]},
+					SectorSize:   m.SectorSize,
 					SectorExpiry: preseal.Deal.EndEpoch,
 				}
 
diff --git a/storage/mockstorage/preseal.go b/storage/mockstorage/preseal.go
index 1a2c01e8b..740deb6c9 100644
--- a/storage/mockstorage/preseal.go
+++ b/storage/mockstorage/preseal.go
@@ -31,7 +31,7 @@ func PreSeal(ssize abi.SectorSize, maddr address.Address, sectors int) (*genesis
 		Sectors:       make([]*genesis.PreSeal, sectors),
 	}
 
-	_, st, err := ffiwrapper.SealProofTypeFromSectorSize(ssize)
+	st, err := ffiwrapper.SealProofTypeFromSectorSize(ssize)
 	if err != nil {
 		return nil, nil, err
 	}