Index: head/audio/vamp-plugin-sdk/Makefile
===================================================================
--- head/audio/vamp-plugin-sdk/Makefile	(revision 487240)
+++ head/audio/vamp-plugin-sdk/Makefile	(revision 487241)
@@ -1,27 +1,27 @@
 # Created by: mathias.picker@gmx.de
 # $FreeBSD$
 
 PORTNAME=	vamp-plugin-sdk
 PORTVERSION=	2.7.1
 CATEGORIES=	audio
 MASTER_SITES=	https://code.soundsoftware.ac.uk/attachments/download/2206/
 
 MAINTAINER=	uddka@student.kit.edu
 COMMENT=	Vamp audio analysis plugin SDK
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libsndfile.so:audio/libsndfile
 
 GNU_CONFIGURE=	yes
-USES=		gmake pathfix pkgconfig
+USES=		compiler:c++11-lang gmake pathfix pkgconfig
 USE_LDCONFIG=	yes
 
 post-install:
 	${STRIP_CMD} \
 		${STAGEDIR}${PREFIX}/bin/* \
 		${STAGEDIR}${PREFIX}/lib/*.so \
 		${STAGEDIR}${PREFIX}/lib/vamp/*.so
 
 .include <bsd.port.mk>