Index: Makefile
===================================================================
--- Makefile	(revision 482334)
+++ Makefile	(working copy)
@@ -22,7 +22,7 @@
 
 MAKE_JOBS_UNSAFE=yes
 
-USES=		qmake qt:5
+USES=		compiler:c++11-lang qmake qt:5
 USE_QT=		core gui widgets network svg \
 		buildtools_build x11extras concurrent multimedia
 USE_GITHUB=	yes