diff --git a/net/xprobe/Makefile b/net/xprobe/Makefile
index dbc8e5015808..8c4f775f0f1e 100644
--- a/net/xprobe/Makefile
+++ b/net/xprobe/Makefile
@@ -1,20 +1,29 @@
 PORTNAME=	xprobe2
 PORTVERSION=	0.3
 PORTREVISION=	1
 CATEGORIES=	net
 MASTER_SITES=	SF/xprobe/xprobe2/Xprobe2%20${PORTVERSION}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	ICMP active OS fingerprint scanner
 WWW=		http://xprobe.sourceforge.net/
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 CONFIGURE_ENV=	INSTALL=${INSTALL}
 GNU_CONFIGURE=	yes
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400091 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
+USES+=	llvm:max=15
+CC=	clang${LLVM_VERSION}
+CPP=	clang-cpp${LLVM_VERSION}
+CXX=	clang++${LLVM_VERSION}
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e 's|-DBROKEN_BSD||' ${WRKSRC}/libs-external/USI++/src/configure
 
 .include <bsd.port.mk>