Index: head/emulators/x16-emulator/Makefile
===================================================================
--- head/emulators/x16-emulator/Makefile	(revision 529935)
+++ head/emulators/x16-emulator/Makefile	(revision 529936)
@@ -1,36 +1,36 @@
 # $FreeBSD$
 
 PORTNAME=	x16-emulator
 DISTVERSION=	r37
 CATEGORIES=	emulators
 
 MAINTAINER=	makc@FreeBSD.org
 COMMENT=	Emulator for the Commander X16 8-bit computer
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	${DATADIR}/rom.bin:emulators/x16-rom
 
-USES=		gmake sdl
+USES=		compiler:c++11-lang gmake sdl
 
 USE_SDL=	sdl2
 USE_GITHUB=	yes
 GH_ACCOUNT=	commanderx16
 
 DESKTOP_ENTRIES=	"Commander X16" \
 			"" \
 			"" \
 			"x16emu" \
 			"" \
 			true
 
 PLIST_FILES=	bin/x16emu
 
 post-patch:
 	${REINPLACE_CMD} -e "s,%%PREFIX%%,${PREFIX}," ${WRKSRC}/main.c
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/x16emu ${STAGEDIR}${PREFIX}/bin
 
 .include <bsd.port.mk>