diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index d9a3345a244a..009971ea8f08 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1151,7 +1151,7 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
 		list_move_tail(&dc->list, wait_list);
 
 		/* sanity check on discard range */
-		__check_sit_bitmap(sbi, start, start + len);
+		__check_sit_bitmap(sbi, lstart, lstart + len);
 
 		bio->bi_private = dc;
 		bio->bi_end_io = f2fs_submit_discard_endio;