diff --git a/extern/storage-sealing/checks.go b/extern/storage-sealing/checks.go
index 5ee39e58f..5ba23026d 100644
--- a/extern/storage-sealing/checks.go
+++ b/extern/storage-sealing/checks.go
@@ -62,7 +62,7 @@ func checkPieces(ctx context.Context, maddr address.Address, si SectorInfo, api
 		}
 
 		if proposal.PieceCID != p.Piece.PieceCID {
-			return &ErrInvalidDeals{xerrors.Errorf("piece %d (of %d) of sector %d refers deal %d with wrong PieceCID: %x != %x", i, len(si.Pieces), si.SectorNumber, p.DealInfo.DealID, p.Piece.PieceCID, proposal.PieceCID)}
+			return &ErrInvalidDeals{xerrors.Errorf("piece %d (of %d) of sector %d refers deal %d with wrong PieceCID: %s != %s", i, len(si.Pieces), si.SectorNumber, p.DealInfo.DealID, p.Piece.PieceCID, proposal.PieceCID)}
 		}
 
 		if p.Piece.Size != proposal.PieceSize {
diff --git a/extern/storage-sealing/states_failed.go b/extern/storage-sealing/states_failed.go
index 201c4456f..bd5f489b4 100644
--- a/extern/storage-sealing/states_failed.go
+++ b/extern/storage-sealing/states_failed.go
@@ -142,7 +142,7 @@ func (m *Sealing) handlePreCommitFailed(ctx statemachine.Context, sector SectorI
 		}
 
 		if pci.Info.SealedCID != *sector.CommR {
-			log.Warnf("sector %d is precommitted on chain, with different CommR: %x != %x", sector.SectorNumber, pci.Info.SealedCID, sector.CommR)
+			log.Warnf("sector %d is precommitted on chain, with different CommR: %s != %s", sector.SectorNumber, pci.Info.SealedCID, sector.CommR)
 			return nil // TODO: remove when the actor allows re-precommit
 		}
 
@@ -354,7 +354,7 @@ func (m *Sealing) handleRecoverDealIDs(ctx statemachine.Context, sector SectorIn
 		}
 
 		if proposal.PieceCID != p.Piece.PieceCID {
-			log.Warnf("piece %d (of %d) of sector %d refers deal %d with wrong PieceCID: %x != %x", i, len(sector.Pieces), sector.SectorNumber, p.DealInfo.DealID, p.Piece.PieceCID, proposal.PieceCID)
+			log.Warnf("piece %d (of %d) of sector %d refers deal %d with wrong PieceCID: %s != %s", i, len(sector.Pieces), sector.SectorNumber, p.DealInfo.DealID, p.Piece.PieceCID, proposal.PieceCID)
 			toFix = append(toFix, i)
 			continue
 		}
diff --git a/extern/storage-sealing/states_sealing.go b/extern/storage-sealing/states_sealing.go
index 1442d82cc..5c798f4eb 100644
--- a/extern/storage-sealing/states_sealing.go
+++ b/extern/storage-sealing/states_sealing.go
@@ -524,7 +524,7 @@ func (m *Sealing) handleCommitting(ctx statemachine.Context, sector SectorInfo)
 
 	log.Info("scheduling seal proof computation...")
 
-	log.Infof("KOMIT %d %x(%d); %x(%d); %v; r:%x; d:%x", sector.SectorNumber, sector.TicketValue, sector.TicketEpoch, sector.SeedValue, sector.SeedEpoch, sector.pieceInfos(), sector.CommR, sector.CommD)
+	log.Infof("KOMIT %d %x(%d); %x(%d); %v; r:%s; d:%s", sector.SectorNumber, sector.TicketValue, sector.TicketEpoch, sector.SeedValue, sector.SeedEpoch, sector.pieceInfos(), sector.CommR, sector.CommD)
 
 	if sector.CommD == nil || sector.CommR == nil {
 		return ctx.Send(SectorCommitFailed{xerrors.Errorf("sector had nil commR or commD")})