Index: head/devel/rgbds/Makefile
===================================================================
--- head/devel/rgbds/Makefile	(revision 567985)
+++ head/devel/rgbds/Makefile	(revision 567986)
@@ -1,19 +1,19 @@
 # $FreeBSD$
 
 PORTNAME=	rgbds
 DISTVERSION=	0.5.0-rc1
 CATEGORIES=	devel games
 MASTER_SITES=	https://github.com/gbdev/rgbds/releases/download/v${DISTVERSION}/
 
 MAINTAINER=	tobik@FreeBSD.org
 COMMENT=	Free assembler/linker for the Game Boy & Game Boy Color
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libpng.so:graphics/png
 
-USES=		bison dos2unix pkgconfig
+USES=		bison compiler:c11 dos2unix pkgconfig
 WRKSRC=		${WRKDIR}/rgbds
 
 .include <bsd.port.mk>