diff --git a/mail/usendmail/Makefile b/mail/usendmail/Makefile
index 588278b28f53..374a7eacc2b8 100644
--- a/mail/usendmail/Makefile
+++ b/mail/usendmail/Makefile
@@ -1,44 +1,48 @@
 # Created by: Thomas Seck <tmseck@netcologne.de>
 
 PORTNAME=	usendmail
 PORTVERSION=	0.1.6
 PORTREVISION=	2
 CATEGORIES=	mail
 MASTER_SITES=	http://www.ohse.de/uwe/usendmail/
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Replacement for qmail's sendmail drop-in
 
 USES=		qmail
 
-BROKEN_aarch64=		fails to build: regparm is not valid on this platform
-BROKEN_armv6=		fails to build: regparm is not valid on this platform
 BROKEN_armv7=		fails to build: auto-aliastest.c:3:34: error: alias must point to a defined variable or function
 BROKEN_riscv64=		fails to build: auto-aliastest.c:3:34: error: alias must point to a defined variable or function
 
 WRKSRC=		${WRKDIR}/mail/${DISTNAME}
 
 PLIST_FILES=	sbin/usendmail
 PORTDOCS=	NEWS README
 SUB_FILES=	pkg-message
 SUB_LIST=	QMAIL_PREFIX=${QMAIL_PREFIX}
 
 OPTIONS_DEFINE=	DOCS
 
+.include <bsd.port.options.mk>
+
+.if ${ARCH} != amd64 && ${ARCH} != i386
+USES+=		compiler:gcc-c++11-lib
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e 's,/var/qmail,${QMAIL_PREFIX},' \
 		${WRKSRC}/src/usendmail.c
 	@${REINPLACE_CMD} -e 's,^CC=,CC\?=,' \
 		${WRKSRC}/src/Makefile
 
 do-test:
 	cd ${WRKSRC} && ./package/check
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/command/usendmail ${STAGEDIR}${PREFIX}/sbin
 
 do-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	cd ${WRKSRC}/src && ${INSTALL_DATA} ${PORTDOCS} ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>