Index: head/www/varnish-libvmod-maxminddb/Makefile
===================================================================
--- head/www/varnish-libvmod-maxminddb/Makefile	(revision 501091)
+++ head/www/varnish-libvmod-maxminddb/Makefile	(revision 501092)
@@ -1,31 +1,32 @@
 # $FreeBSD$
 
 PORTNAME=	libvmod-maxminddb
 DISTVERSION=	1.0.0
 CATEGORIES=	www
 PKGNAMEPREFIX=	varnish-
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Varnish Module (vmod) for accessing maxminddb geoip data
 
 LICENSE=	BSD2CLAUSE
 
 BUILD_DEPENDS=	rst2man:textproc/py-docutils
 
 LIB_DEPENDS=	libmaxminddb.so:net/libmaxminddb
 
-USES=		autoreconf gmake libtool pkgconfig python:2.7,build varnish
+USES=		autoreconf compiler:c11 gmake libtool pkgconfig \
+		python:2.7,build varnish
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--disable-static
 INSTALL_TARGET=	install-strip
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	simonvik
 GH_PROJECT=	libvmod_maxminddb
 GH_TAGNAME=	4ae6a7f
 
 MAKE_JOBS_UNSAFE=	yes
 
 OPTIONS_DEFINE=	DOCS
 
 .include <bsd.port.mk>