diff --git a/devel/tcl-trf/Makefile b/devel/tcl-trf/Makefile
index 5902242f165d..7055435b6b56 100644
--- a/devel/tcl-trf/Makefile
+++ b/devel/tcl-trf/Makefile
@@ -1,47 +1,54 @@
 PORTNAME=	Trf
 PORTVERSION=	2.1.4
 PORTREVISION=	3
 CATEGORIES=	devel tcl
 MASTER_SITES=	SF/tcltrf/tcltrf/${PORTVERSION}
 PKGNAMEPREFIX=	tcl-
 DISTNAME=	trf${PORTVERSION}
 
 MAINTAINER=	mi@aldan.algebra.com
 COMMENT=	Data conversion, digests, compression, error-correction for Tcl
 WWW=		https://wiki.tcl-lang.org/479
 
 LICENSE=	Tcl_Trf_License
 LICENSE_NAME=	Tcl Trf License
 LICENSE_FILE=	${WRKSRC}/doc/license.terms
 LICENSE_PERMS=	dist-mirror dist-sell pkg-mirror pkg-sell auto-accept
 
 TEST_DEPENDS=	${LOCALBASE}/lib/Memchan2.3/libMemchan.so.1:devel/tcl-memchan
 
-USES+=		tcl:tea tar:bzip2
+USES+=		tcl:tea tar:bzip2 compiler
 USE_LDCONFIG=	${PREFIX}/lib/Trf
 DDIR=		${PREFIX}/lib/tcl${TCL_VER}/Trf
 CFLAGS+=	-Wall -Werror
 
 MAKE_ENV+=	INSTALL_DATA="${INSTALL_DATA}"
 
 REINPLACE_ARGS=	-i ""
 CONFIGURE_ARGS+=--enable-static-zlib --enable-static-bzlib \
 		--enable-static-md5
+CONFIGURE_ENV+=	CC=${CC}
 
 do-install:
 	${MKDIR} ${STAGEDIR}${PREFIX}/lib/Trf
 	${INSTALL_DATA} ${WRKSRC}/libTrf${PORTVERSION}.so \
 		${WRKSRC}/pkgIndex.tcl ${STAGEDIR}${PREFIX}/lib/Trf/
 	for m in ${WRKSRC}/doc/man/*.n	;	\
 	do	\
 		${INSTALL_MAN} $$m ${STAGEDIR}${MANNPREFIX}/man/mann/ ;\
 	done
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/Trf/libTrf${PORTVERSION}.so
 
 do-test:
 	cd ${WRKSRC} && ${SETENV} TCLLIBPATH="${WRKSRC}" ${TCLSH} \
 		${FILESDIR}/alltests.tcl
 
 PLIST_SUB+=	TCL_DVER=${TCL_VER:C/\.//} VER=${PORTVERSION}
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 150
+CFLAGS+=	-Wno-deprecated-non-prototype
+.endif
+
+.include <bsd.port.post.mk>