Index: Makefile
===================================================================
--- Makefile	(revision 486085)
+++ Makefile	(working copy)
@@ -56,7 +56,7 @@
 TOOLKIT_DESC=	Qt toolkit
 QT4_USES=	qt:4
 QT4_USE=	${_USE_QT4:S/^/QT=/}
-QT5_USES=	qt:5
+QT5_USES=	compiler:c++11-lang qt:5
 QT5_USE=	${_USE_QT5:S/^/QT=/}
 QT5_CMAKE_ON=	-Dkst_qt5=on