Index: head/misc/survex/Makefile
===================================================================
--- head/misc/survex/Makefile	(revision 487813)
+++ head/misc/survex/Makefile	(revision 487814)
@@ -1,30 +1,30 @@
 # $FreeBSD$
 
 PORTNAME=	survex
 DISTVERSION=	1.2.37
 CATEGORIES=	misc
 MASTER_SITES=	https://survex.com/software/${DISTVERSION}/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Cave survey software
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libavcodec.so:multimedia/ffmpeg \
 		libproj.so:graphics/proj
 
-USES=		desktop-file-utils gl gmake gnome pkgconfig shared-mime-info
+USES=		compiler:c++11-lang desktop-file-utils gl gmake gnome pkgconfig shared-mime-info
 GNU_CONFIGURE=	yes
 USE_WX=		3.0
 USE_XORG=	xxf86vm
 USE_GL=		gl glu
 INSTALLS_ICONS=	yes # because wxWidgets-3.0 is gtk/gnome based
 
 MAKE_ENV=	WX_CONFIG=${WX_CONFIG}
 
 OPTIONS_DEFINE=	DOCS
 
 PORTDOCS=	*
 
 .include <bsd.port.mk>