diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 83d36d3..b006857 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -317,6 +317,7 @@
 struct nfs_lowner {
 	__u64			clientid;
 	__u64			id;
+	dev_t			s_dev;
 };
 
 struct nfs_lock_args {