diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 5b950382bbc0..822b4de6238f 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1098,7 +1098,7 @@ static int iomap_write_delalloc_scan(struct inode *inode,
 		}
 
 		/* move offset to start of next folio in range */
-		start_byte = folio_next_index(folio) << PAGE_SHIFT;
+		start_byte = folio_pos(folio) + folio_size(folio);
 		folio_unlock(folio);
 		folio_put(folio);
 	}