diff --git a/states.go b/states.go
index 426f028ad..b3f033a9d 100644
--- a/states.go
+++ b/states.go
@@ -100,7 +100,7 @@ func (m *Sealing) handlePreCommitting(ctx statemachine.Context, sector SectorInf
 	params := &miner.SectorPreCommitInfo{
 		Expiration:      10000000, // TODO: implement
 		SectorNumber:    sector.SectorID,
-		RegisteredProof: abi.RegisteredProof_StackedDRG32GiBSeal,
+		RegisteredProof: sector.SectorType,
 
 		SealedCID:     *sector.CommR,
 		SealRandEpoch: sector.Ticket.Epoch,