diff --git a/cmd/lotus-bench/main.go b/cmd/lotus-bench/main.go
index e409dfe5a..b2b73710e 100644
--- a/cmd/lotus-bench/main.go
+++ b/cmd/lotus-bench/main.go
@@ -614,7 +614,7 @@ func runSeals(sb *ffiwrapper.Sealer, sbfs *basicfs.Provider, numSectors int, par
 					if !skipunseal {
 						log.Infof("[%d] Unsealing sector", i)
 						{
-							p, done, err := sbfs.AcquireSector(context.TODO(), abi.SectorID{Miner: mid, Number: 1}, stores.FTUnsealed, stores.FTNone, stores.PathSealing)
+							p, done, err := sbfs.AcquireSector(context.TODO(), abi.SectorID{Miner: mid, Number: i}, stores.FTUnsealed, stores.FTNone, stores.PathSealing)
 							if err != nil {
 								return xerrors.Errorf("acquire unsealed sector for removing: %w", err)
 							}
@@ -625,7 +625,7 @@ func runSeals(sb *ffiwrapper.Sealer, sbfs *basicfs.Provider, numSectors int, par
 							}
 						}
 
-						err := sb.UnsealPiece(context.TODO(), abi.SectorID{Miner: mid, Number: 1}, 0, abi.PaddedPieceSize(sectorSize).Unpadded(), ticket, cids.Unsealed)
+						err := sb.UnsealPiece(context.TODO(), abi.SectorID{Miner: mid, Number: i}, 0, abi.PaddedPieceSize(sectorSize).Unpadded(), ticket, cids.Unsealed)
 						if err != nil {
 							return err
 						}