diff -up nfs-utils-1.3.0/utils/mount/mount_libmount.c.orig nfs-utils-1.3.0/utils/mount/mount_libmount.c

--- nfs-utils-1.3.0/utils/mount/mount_libmount.c.orig	2016-06-08 09:48:19.446035537 -0400

+++ nfs-utils-1.3.0/utils/mount/mount_libmount.c	2016-06-08 09:57:58.389518986 -0400

@@ -207,6 +207,7 @@ static int umount_main(struct libmnt_con

 	if (!spec || (*spec != '/' && strchr(spec,':') == NULL)) {

 		nfs_error(_("%s: no mount point provided"), progname);

+		umount_usage();

 		return EX_USAGE;

 	}

@@ -328,6 +329,7 @@ static int mount_main(struct libmnt_cont

 	if (!mount_point) {

 		nfs_error(_("%s: no mount point provided"), progname);

+		mount_usage();

 		goto err;

 	}

 	if (!spec) {