diff --git a/cmd/lotus-pcr/main.go b/cmd/lotus-pcr/main.go
index 3dedb24fc..53c8223ed 100644
--- a/cmd/lotus-pcr/main.go
+++ b/cmd/lotus-pcr/main.go
@@ -412,7 +412,7 @@ func (r *refunder) ProcessTipset(ctx context.Context, tipset *types.TipSet, refu
 				sn = proveCommitSector.SectorNumber
 			} else {
 				// TODO: ActorUpgrade
-				sn = -1
+				sn = 0
 			}
 
 			// We use the parent tipset key because precommit information is removed when ProveCommitSector is executed