diff --git a/multimedia/opentoonz/Makefile b/multimedia/opentoonz/Makefile
index 084f3fc8bcc4..362e14cc2dc0 100644
--- a/multimedia/opentoonz/Makefile
+++ b/multimedia/opentoonz/Makefile
@@ -1,32 +1,33 @@
 PORTNAME=	opentoonz
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.5.0
 CATEGORIES=	multimedia
 
 MAINTAINER=	kde@FreeBSD.org
 COMMENT=	2D animation software
 
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 BUILD_DEPENDS=	boost-libs>0:devel/boost-libs
 LIB_DEPENDS=	libgslcblas.so:math/gsl \
 		libjson-c.so:devel/json-c \
 		liblz4.so:archivers/liblz4 \
 		liblzo2.so:archivers/lzo2 \
 		libmypaint.so:graphics/libmypaint \
 		libopencv_core.so:graphics/opencv \
 		libpng16.so:graphics/png \
 		libsuperlu.so:math/superlu \
 		libturbojpeg.so:graphics/libjpeg-turbo
 
-USES=		cmake:noninja gettext-runtime gl gnome jpeg pkgconfig qt:5
+USES=		cmake:noninja compiler:c++11-lang gettext-runtime gl \
+		gnome jpeg pkgconfig qt:5
 USE_GITHUB=	yes
 USE_GL=		gl glew glu glut
 USE_GNOME=	glib20
 USE_QT=		core gui multimedia network opengl printsupport \
 		script serialport svg widgets xml \
 		buildtools_build linguisttools_build qmake_build
 
 CMAKE_SOURCE_PATH=	${WRKSRC}/toonz/sources
 
 .include <bsd.port.mk>