Index: head/x11/xfce4-conf/Makefile
===================================================================
--- head/x11/xfce4-conf/Makefile	(revision 512709)
+++ head/x11/xfce4-conf/Makefile	(revision 512710)
@@ -1,57 +1,57 @@
 # Created by: Oliver Lehmann <oliver@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	xfce4-conf
 PORTVERSION=	4.14.1
 CATEGORIES=	x11 xfce
 MASTER_SITES=	XFCE
 DISTNAME=	xfconf-${DISTVERSIONFULL}
 DIST_SUBDIR=	xfce4
 
 MAINTAINER=	xfce@FreeBSD.org
 COMMENT=	D-Bus-based configuration storage system
 
 LICENSE=	GPLv2
 
 BUILD_DEPENDS=	p5-XML-Parser>=2.44:textproc/p5-XML-Parser
 
-USES=		gettext-tools gmake gnome libtool pathfix perl5 pkgconfig \
-		tar:bzip2 xfce xorg
+USES=		compiler:c11 gettext-tools gmake gnome libtool pathfix perl5 \
+		pkgconfig tar:bzip2 xfce xorg
 USE_GNOME=	glib20 intltool
 USE_LDCONFIG=	yes
 USE_PERL5=	build
 USE_XFCE=	libutil
 USE_XORG=	x11
 
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
 CONFIGURE_ARGS=	--without-html-dir
 
 PORTSCOUT=	limitw:1,even
 
 OPTIONS_DEFINE=		GIR NLS PERL VAPI
 OPTIONS_DEFAULT=	GIR VAPI
 OPTIONS_SUB=		yes
 
 GIR_DESC=		Use Gobject Introspection
 PERL_DESC=		Perl scripting language bindings (deprecated)
 
 GIR_USE=		gnome=introspection:build
 GIR_CONFIGURE_ON=	--enable-introspection=yes
 GIR_CONFIGURE_OFF=	--enable-introspection=no
 
 NLS_CONFIGURE_ENABLE=	nls
 NLS_USES=		gettext-runtime
 
 PERL_BUILD_DEPENDS=	p5-ExtUtils-Depends>=0.405:devel/p5-ExtUtils-Depends \
 			p5-ExtUtils-PkgConfig>=1.15:devel/p5-ExtUtils-PkgConfig \
 			p5-Glib2>=1.321:devel/p5-Glib2
 PERL_CONFIGURE_ENABLE=	perl-bindings
 PERL_LIB_DEPENDS=	libdbus-1.so:devel/dbus
 PERL_USE=		perl5=run
 
 VAPI_BUILD_DEPENDS=	vapigen:lang/vala
 VAPI_CONFIGURE_ENABLE=	vala
 VAPA_IMPLIES=		GIR
 
 .include <bsd.port.mk>