Index: head/comms/libsdr/Makefile
===================================================================
--- head/comms/libsdr/Makefile	(revision 488709)
+++ head/comms/libsdr/Makefile	(revision 488710)
@@ -1,27 +1,27 @@
 # Created by: Jeffrey Baitis <jeff@baitis.net>
 # $FreeBSD$
 
 PORTNAME=	libsdr
 PORTVERSION=	0.1.0
 DISTVERSIONPREFIX=	v
 CATEGORIES=	comms hamradio
 
 MAINTAINER=	jeff@baitis.net
 COMMENT=	Simple software defined radio (SDR) library
 
 LICENSE=	GPLv2
 
 LIB_DEPENDS=	libportaudio.so:audio/portaudio \
 		libfftw3.so:math/fftw3 \
 		libfftw3f.so:math/fftw3-float \
 		librtlsdr.so:comms/rtl-sdr
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	hmatuschek
 
 MAKE_JOBS_UNSAFE=	yes
-USES=		cmake pkgconfig
+USES=		compiler:c++11-lang cmake pkgconfig
 CMAKE_ARGS+=-DCMAKE_BUILD_TYPE=RELEASE
 USE_LDCONFIG=	yes
 
 .include <bsd.port.mk>