diff --git a/chain/gen/gen.go b/chain/gen/gen.go
index 9c8bfadfb..ef3690a15 100644
--- a/chain/gen/gen.go
+++ b/chain/gen/gen.go
@@ -557,8 +557,10 @@ func ComputeProof(ctx context.Context, epp ElectionPoStProver, pi *ProofInput) (
 		PostRand: pi.vrfout,
 	}
 	for _, win := range pi.winners {
+		part := make([]byte, 32)
+		copy(part, win.PartialTicket[:])
 		ept.Candidates = append(ept.Candidates, types.EPostTicket{
-			Partial:        win.PartialTicket[:],
+			Partial:        part,
 			SectorID:       win.SectorID,
 			ChallengeIndex: win.SectorChallengeIndex,
 		})
diff --git a/storage/fpost_run.go b/storage/fpost_run.go
index a2cf88810..f3c031279 100644
--- a/storage/fpost_run.go
+++ b/storage/fpost_run.go
@@ -73,8 +73,10 @@ func (s *fpostScheduler) runPost(ctx context.Context, eps uint64, ts *types.TipS
 
 	candidates := make([]types.EPostTicket, len(scandidates))
 	for i, sc := range scandidates {
+		part := make([]byte, 32)
+		copy(part, sc.PartialTicket[:])
 		candidates[i] = types.EPostTicket{
-			Partial:        sc.PartialTicket[:],
+			Partial:        part,
 			SectorID:       sc.SectorID,
 			ChallengeIndex: sc.SectorChallengeIndex,
 		}