diff --git a/block/blk-core.c b/block/blk-core.c
index 827f8ba..b60537b 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -706,7 +706,7 @@
 		goto fail_id;
 
 	q->backing_dev_info.ra_pages =
-			(VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
+			(VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
 	q->backing_dev_info.capabilities = BDI_CAP_CGROUP_WRITEBACK;
 	q->backing_dev_info.name = "block";
 	q->node = node_id;