diff -up nfs-utils-1.3.0/utils/mountd/mountd.c.orig nfs-utils-1.3.0/utils/mountd/mountd.c

--- nfs-utils-1.3.0/utils/mountd/mountd.c.orig	2016-02-11 09:57:51.376317000 -0500

+++ nfs-utils-1.3.0/utils/mountd/mountd.c	2016-02-11 10:02:54.377956000 -0500

@@ -911,7 +911,8 @@ usage(const char *prog, int n)

 "	[-o num|--descriptors num] [-f exports-file|--exports-file=file]\n"

 "	[-p|--port port] [-V version|--nfs-version version]\n"

 "	[-N version|--no-nfs-version version] [-n|--no-tcp]\n"

-"	[-H ha-callout-prog] [-s|--state-directory-path path]\n"

-"	[-g|--manage-gids] [-t num|--num-threads=num] [-u|--no-udp]\n", prog);

+"	[-H prog |--ha-callout prog] [-r |--reverse-lookup]\n"

+"	[-s|--state-directory-path path] [-g|--manage-gids]\n"

+"	[-t num|--num-threads=num] [-u|--no-udp]\n", prog);

 	exit(n);

 }