diff --git a/mm/readahead.c b/mm/readahead.c
index 95a24f12d1e7..406756d34309 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -649,7 +649,7 @@ void page_cache_async_ra(struct readahead_control *ractl,
 	 * Ramp up sizes, and push forward the readahead window.
 	 */
 	expected = round_down(ra->start + ra->size - ra->async_size,
-			1UL << folio_order(folio));
+			folio_nr_pages(folio));
 	if (index == expected) {
 		ra->start += ra->size;
 		/*