Index: head/graphics/diff-pdf/Makefile
===================================================================
--- head/graphics/diff-pdf/Makefile	(revision 495540)
+++ head/graphics/diff-pdf/Makefile	(revision 495541)
@@ -1,32 +1,32 @@
 # $FreeBSD$
 
 PORTNAME=	diff-pdf
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.2-27
 DISTVERSIONSUFFIX=	-gc4d6722
 PORTREVISION=	2
 CATEGORIES=	graphics
 
 MAINTAINER=	uzsolt@uzsolt.hu
 COMMENT=	Tool for visually comparing two PDFs
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libpoppler.so:graphics/poppler \
 		libpoppler-glib.so:graphics/poppler-glib
 
-USES=		autoreconf pkgconfig
+USES=		autoreconf compiler:c++11-lang pkgconfig
 USE_GITHUB=	yes
 GH_ACCOUNT=	vslavik
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-wx-config=${WX_CONFIG}
 USE_GNOME=	cairo glib20
 USE_WX=		2.8+
 
 PLIST_FILES=	bin/${PORTNAME}
 
 post-patch:
 	@${REINPLACE_CMD} '/AM_PATH_WXCONFIG/ s,3.0.0,2.8.0,' ${WRKSRC}/configure.ac
 
 .include <bsd.port.mk>