diff --git a/x11/xsnow/Makefile b/x11/xsnow/Makefile
index 87706b6c2966..5d1c0f8b916c 100644
--- a/x11/xsnow/Makefile
+++ b/x11/xsnow/Makefile
@@ -1,28 +1,28 @@
 # Created by: jmz
 # $FreeBSD$
 
 PORTNAME=	xsnow
 PORTVERSION=	3.2.0
 CATEGORIES=	x11
 MASTER_SITES=	SF/${PORTNAME}/
 
 MAINTAINER=	fluffy@FreeBSD.org
 COMMENT=	Create a snowy and Santa-y desktop
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-USES=		gmake gnome pkgconfig xorg
+USES=		compiler:c11 gmake gnome pkgconfig xorg
 USE_GNOME=	cairo gdkpixbuf2 glib20 gtk30 libxml2
 USE_XORG=	x11 xpm xt xorgproto
 GNU_CONFIGURE=	yes
 PLIST_FILES=	bin/xsnow man/man6/xsnow.6.gz \
 		share/applications/xsnow.desktop \
 		share/pixmaps/xsnow.svg
 
 post-patch:
 	@${REINPLACE_CMD} \
 		-e 's,/games,/bin,g' \
 			${WRKSRC}/src/Makefile.in
 
 .include <bsd.port.mk>