diff --git a/mm/swapfile.c b/mm/swapfile.c
index 2f59495782dd..cf62bdb7b304 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1038,7 +1038,7 @@ start_over:
 			goto nextsi;
 		}
 		if (size == SWAPFILE_CLUSTER) {
-			if (!(si->flags & SWP_FS))
+			if (si->flags & SWP_BLKDEV)
 				n_ret = swap_alloc_cluster(si, swp_entries);
 		} else
 			n_ret = scan_swap_map_slots(si, SWAP_HAS_CACHE,