Index: Makefile
===================================================================
--- Makefile	(revision 487878)
+++ Makefile	(working copy)
@@ -11,7 +11,7 @@
 LICENSE=	ISCL
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-USES=		gettext-runtime gl python:3.4+ qmake qt:5
+USES=		compiler:c++11-lang gettext-runtime gl python:3.4+ qmake qt:5
 USE_QT=		core declarative gui network quickcontrols svg testlib \
 		widgets buildtools_build
 USE_GL=		gl