diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 5f372c0..94cf6bc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -510,6 +510,7 @@
 	nid_t available_nids;		/* maximum available node ids */
 	nid_t next_scan_nid;		/* the next nid to be scanned */
 	unsigned int ram_thresh;	/* control the memory footprint */
+	unsigned int ra_nid_pages;	/* # of nid pages to be readaheaded */
 
 	/* NAT cache management */
 	struct radix_tree_root nat_root;/* root of the nat entry cache */