Index: head/usr.sbin/trpt/Makefile
===================================================================
--- head/usr.sbin/trpt/Makefile	(revision 329353)
+++ head/usr.sbin/trpt/Makefile	(revision 329354)
@@ -1,19 +1,27 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 # $FreeBSD$
 
 .include <src.opts.mk>
 
 PROG=	trpt
 MAN=	trpt.8
 BINGRP=	kmem
 BINMODE= 2555
 
+.if ${MACHINE_CPUARCH} != "aarch64" && ${MACHINE_CPUARCH} != "amd64" && \
+    ${MACHINE_CPUARCH} != "i386" && ${MACHINE_CPUARCH} != "riscv"
+WARNS?=	4
+.endif
+
 .if ${MK_INET6_SUPPORT} != "no"
 CFLAGS+= -DINET6
 .endif
 
 .include <bsd.prog.mk>
 
+.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
+    ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "riscv"
 # Several included system headers tickle this warning in ways that are
 # difficult to work around in this program.
 CFLAGS+= -Wno-missing-variable-declarations
+.endif