Index: head/mail/xfce4-mailwatch-plugin/Makefile
===================================================================
--- head/mail/xfce4-mailwatch-plugin/Makefile	(revision 513677)
+++ head/mail/xfce4-mailwatch-plugin/Makefile	(revision 513678)
@@ -1,45 +1,45 @@
 # Created by: Martin Wilke (miwi@FreeBSD.org)
 # $FreeBSD$
 
 PORTNAME=	xfce4-mailwatch-plugin
 PORTVERSION=	1.2.0
 PORTREVISION=	10
 CATEGORIES=	mail xfce
 MASTER_SITES=	XFCE/panel-plugins
 DIST_SUBDIR=	xfce4
 
 MAINTAINER=	xfce@FreeBSD.org
 COMMENT=	Mail notification applet for the Xfce panel
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libgnutls.so:security/gnutls \
 		libgcrypt.so:security/libgcrypt \
 		libgpg-error.so:security/libgpg-error \
 		libfontconfig.so:x11-fonts/fontconfig \
 		libfreetype.so:print/freetype2
 
-USES=		gettext-tools gmake gnome libtool pkgconfig tar:bzip2 \
-		xfce:gtk2 xorg
+USES=		compiler:c11 gettext-tools gmake gnome libtool pkgconfig \
+		tar:bzip2 xfce:gtk2 xorg
 USE_GNOME=	cairo glib20 gtk20 intltool
 USE_XFCE=	panel
 USE_XORG=	x11
 
 GNU_CONFIGURE=	yes
 INSTALLS_ICONS=	yes
 INSTALL_TARGET=	install-strip
 
 OPTIONS_DEFINE=		IPV6 NLS
 OPTIONS_SUB=		yes
 
 IPV6_CONFIGURE_ENABLE=	ipv6
 
 NLS_CONFIGURE_ENABLE=	nls
 NLS_USES=		gettext-runtime
 
 post-patch:
 	${REINPLACE_CMD} -e 's|xfce-mail|mail-send|' \
 		${WRKSRC}/panel-plugin/mailwatch-plugin.c
 
 .include <bsd.port.mk>