diff --git a/benchmarks/kdiskmark/Makefile b/benchmarks/kdiskmark/Makefile
index d866001a95f1..e0f8b39534e7 100644
--- a/benchmarks/kdiskmark/Makefile
+++ b/benchmarks/kdiskmark/Makefile
@@ -1,30 +1,30 @@
 # Created by: Alexey Dokuchaev <danfe@FreeBSD.org>
 
 PORTNAME=	kdiskmark
 PORTVERSION=	2.2.0
 CATEGORIES=	benchmarks
 
 MAINTAINER=	danfe@FreeBSD.org
 COMMENT=	Graphical HDD/SSD benchmarking tool
 
 LICENSE=	GPLv3
 
 RUN_DEPENDS=	fio:benchmarks/fio
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	JonMagon
 GH_PROJECT=	KDiskMark
 
-USES=		cmake kde:5 qt:5
+USES=		cmake compiler:c++11-lang kde:5 qt:5
 USE_QT=		buildtools_build linguisttools_build qmake_build \
 		core gui widgets
 USE_KDE=	auth coreaddons
 
 post-patch:
 	@${REINPLACE_CMD} -e '/--ioengine=/s,libaio,posixaio,' \
 		${WRKSRC}/src/benchmark.cpp
 # XXX: disable pagecache flushing by default to avoid "kf.auth: Tried
 # to start an invalid action: org.jonmagon.kdiskmark.dropcache" error.
 	@${REINPLACE_CMD} -e '908s,true,false,' ${WRKSRC}/src/mainwindow.ui
 
 .include <bsd.port.mk>