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

--- nfs-utils-1.3.0/utils/nfsdcltrack/nfsdcltrack.c.orig	2017-10-12 12:46:02.785182594 -0400

+++ nfs-utils-1.3.0/utils/nfsdcltrack/nfsdcltrack.c	2017-10-12 13:30:35.756186324 -0400

@@ -591,7 +591,7 @@ main(int argc, char **argv)

 			break;

 		default:

 			usage(progname);

-			return 0;

+			return 1;

 		}

 	}