Index: head/comms/libsdr-gui/Makefile
===================================================================
--- head/comms/libsdr-gui/Makefile	(revision 483680)
+++ head/comms/libsdr-gui/Makefile	(revision 483681)
@@ -1,26 +1,26 @@
 # Created by: Jeffrey Baitis <jeff@baitis.net>
 # $FreeBSD$
 
 PORTNAME=	libsdr-gui
 PORTVERSION=	0.1.0
 PORTREVISION=	1
 DISTVERSIONPREFIX=	v
 CATEGORIES=	comms hamradio
 
 MAINTAINER=	jeff@baitis.net
 COMMENT=	GUI functions (e.g. waterfall) for libsdr library
 
 LICENSE=	GPLv2
 
 LIB_DEPENDS=	libfftw3.so:math/fftw3 \
 		libfftw3f.so:math/fftw3-float \
 		libsdr.so:comms/libsdr
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	hmatuschek
 
 USE_QT=		core buildtools_build qmake widgets
-USES=		cmake pkgconfig qt:5
+USES=		cmake compiler:c++11-lang pkgconfig qt:5
 USE_LDCONFIG=	yes
 
 .include <bsd.port.mk>