Index: head/graphics/kdiagram/Makefile
===================================================================
--- head/graphics/kdiagram/Makefile	(revision 482600)
+++ head/graphics/kdiagram/Makefile	(revision 482601)
@@ -1,23 +1,23 @@
 # $FreeBSD$
 
 PORTNAME=	kdiagram
 PORTVERSION=	2.6.0
 CATEGORIES=	graphics kde
 MASTER_SITES=   KDE/stable/${PORTNAME}/${PORTVERSION}/src
 DIST_SUBDIR=    KDE/${PORTNAME}
 
 MAINTAINER=	kde@FreeBSD.org
 COMMENT=	Library to create business diagrams
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/LICENSE.GPL.txt
 
-USES=		cmake:outsource kde:5 qt:5 tar:xz
+USES=		cmake:outsource compiler:c++11-lang kde:5 qt:5 tar:xz
 USE_KDE=	ecm
 USE_QT=		core gui linguisttools printsupport sql svg widgets \
 		buildtools_build qmake_build
 
 PLIST_SUB=	SHLIB_VER="${PORTVERSION}" \
 		SHLIB_SHVER="${PORTVERSION:R:R}"
 
 .include <bsd.port.mk>