diff --git a/fs/xfs/scrub/reap.c b/fs/xfs/scrub/reap.c
index 496c6eab555e..f698b9be3dd1 100644
--- a/fs/xfs/scrub/reap.c
+++ b/fs/xfs/scrub/reap.c
@@ -1399,7 +1399,7 @@ xreap_bmapi_binval(
 			 * far we've gotten.
 			 */
 			if (!xreap_inc_binval(rs)) {
-				imap->br_blockcount = agbno_next - bno;
+				imap->br_blockcount = bno - agbno;
 				goto out;
 			}
 		}