diff -Naur sysvinit-2.99/src/halt.c sysvinit-2.99-mod/src/halt.c
--- sysvinit-2.99/src/halt.c	2021-02-21 19:02:25.000000000 +0100
+++ sysvinit-2.99-mod/src/halt.c	2021-06-26 17:00:41.577268981 +0200
@@ -209,6 +209,12 @@
 	if (!strcmp(progname, "reboot")) do_reboot = 1;
 	if (!strcmp(progname, "poweroff")) do_poweroff = 1;
 
+	/* The unmatched doen't reboot, so force poweroff */
+	if (do_reboot) {
+		do_reboot = 0;
+		do_poweroff = 1;
+	}
+
 	/*
 	 *	Get flags
 	 */