Index: head/net/ortp/Makefile
===================================================================
--- head/net/ortp/Makefile	(revision 482844)
+++ head/net/ortp/Makefile	(revision 482845)
@@ -1,26 +1,26 @@
 # Created by: Maxim Sobolev <sobomax@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	ortp
 PORTVERSION=	1.0.2
 CATEGORIES=	net
 MASTER_SITES=	https://www.linphone.org/releases/sources/ortp/
 
 MAINTAINER=	sobomax@FreeBSD.org
 COMMENT=	Real-time Transport Protocol (RTP) library
 
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libbctoolbox.so:net/bctoolbox
 
-USES=		cmake:outsource
+USES=		cmake:outsource compiler:c11
 USE_LDCONFIG=	yes
 
 CMAKE_ARGS=	-DENABLE_DOC=NO -DENABLE_STATIC=NO -DENABLE_STRICT=NO
 WRKSRC= 	${WRKDIR}/${DISTNAME}-0
 
 post-install:
 	${RM} -r ${STAGEDIR}${PREFIX}/share/doc/${DISTNAME}
 
 .include <bsd.port.mk>