diff --git a/extern/storage-sealing/states_sealing.go b/extern/storage-sealing/states_sealing.go
index 3aef55f5d..587ad5937 100644
--- a/extern/storage-sealing/states_sealing.go
+++ b/extern/storage-sealing/states_sealing.go
@@ -311,9 +311,9 @@ func (m *Sealing) preCommitParams(ctx statemachine.Context, sector SectorInfo) (
 
 	msd := policy.GetMaxProveCommitDuration(actors.VersionForNetwork(nv), sector.SectorType)
 
-	// Assume: both precommit msg & commit msg land on chain as late as possible
-	minExpiration := sector.TicketEpoch + policy.MaxPreCommitRandomnessLookback + msd + miner.MinSectorExpiration
-	if expiration < minExpiration {
+	if minExpiration := height + msd + miner.MinSectorExpiration + 10; expiration < minExpiration {
+		expiration = minExpiration
+	}
 
 	// Assume: both precommit msg & commit msg land on chain as early as possible
 	maxExpiration := height + policy.GetPreCommitChallengeDelay() + policy.GetMaxSectorExpirationExtension()