diff --git a/storage/wdpost_run.go b/storage/wdpost_run.go
index 8f15c47965f..08a7437a9bb 100644
--- a/storage/wdpost_run.go
+++ b/storage/wdpost_run.go
@@ -430,14 +430,14 @@ func (s *WindowPoStScheduler) runPost(ctx context.Context, di dline.Info, ts *ty
 				return nil, xerrors.Errorf("adding recoveries to set of sectors to prove: %w", err)
 			}
 
-			toProve, err = bitfield.SubtractBitField(toProve, postSkipped)
+			good, err := s.checkSectors(ctx, toProve)
 			if err != nil {
-				return nil, xerrors.Errorf("toProve - postSkipped: %w", err)
+				return nil, xerrors.Errorf("checking sectors to skip: %w", err)
 			}
 
-			good, err := s.checkSectors(ctx, toProve)
+			good, err = bitfield.SubtractBitField(good, postSkipped)
 			if err != nil {
-				return nil, xerrors.Errorf("checking sectors to skip: %w", err)
+				return nil, xerrors.Errorf("toProve - postSkipped: %w", err)
 			}
 
 			skipped, err := bitfield.SubtractBitField(toProve, good)