Index: head/multimedia/ustreamer/Makefile
===================================================================
--- head/multimedia/ustreamer/Makefile	(revision 500648)
+++ head/multimedia/ustreamer/Makefile	(revision 500649)
@@ -1,24 +1,24 @@
 # $FreeBSD$
 
 PORTNAME=	ustreamer
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.71
 CATEGORIES=	multimedia ipv6 net
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Lightweight and fast MJPG-HTTP streamer
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${LOCALBASE}/include/linux/videodev2.h:multimedia/v4l_compat
 LIB_DEPENDS=	libevent.so:devel/libevent \
 		libuuid.so:misc/e2fsprogs-libuuid
 
-USES=		gmake jpeg localbase:ldflags
+USES=		compiler:c11 gmake jpeg localbase:ldflags
 USE_GITHUB=	yes
 GH_ACCOUNT=	pi-kvm
 
 PLIST_FILES=	bin/ustreamer
 
 .include <bsd.port.mk>