Index: head/games/rottdc/Makefile
===================================================================
--- head/games/rottdc/Makefile	(revision 512411)
+++ head/games/rottdc/Makefile	(revision 512412)
@@ -1,33 +1,33 @@
 # Created by: Igor Pokrovsky <tiamat@comset.net>
 # $FreeBSD$
 
 PORTNAME=	rottdc
 DISTVERSION=	1.0-2
 PORTREVISION=	8
 CATEGORIES=	games
 MASTER_SITES=	SF/sdl-dc/${PORTNAME}/1.0-2
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Apogee's Rise Of The Triad source port
 
-USES=		gmake tar:bzip2
+USES=		compiler:c11 gmake tar:bzip2
 USE_SDL=	sdl mixer
 PATCH_WRKSRC=	${WRKSRC}/rott
 # Crashes when compiling with -O2 or greater, so downgrade to -O1.
 CFLAGS:=	${CFLAGS:C/-O[2-9]/-O1/}
 
 OPTIONS_DEFINE=	DOCS
 
 post-extract:
 	@${CP} ${FILESDIR}/${MAKEFILE} ${WRKSRC}
 
 do-install:
 .for f in rott rott-sw
 	${INSTALL_PROGRAM} ${WRKSRC}/${f}/rott ${STAGEDIR}${PREFIX}/bin/${f}
 .endfor
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/README ${STAGEDIR}${DOCSDIR}
 	(cd ${WRKSRC}/rott && ${INSTALL_DATA} cheats.txt cmdline.txt \
 		${STAGEDIR}${DOCSDIR})
 
 .include <bsd.port.mk>