diff -urNp a/agent/snmpd.c b/agent/snmpd.c

--- a/agent/snmpd.c	2018-10-04 10:34:10.939728847 +0200

+++ b/agent/snmpd.c	2018-10-04 10:34:43.910625603 +0200

@@ -325,6 +325,7 @@ usage(char *prog)

            "  -S d|i|0-7\t\tuse -Ls <facility> instead\n"

            "\n"

            );

+           exit(1);

 }

 static void