Index: Makefile
===================================================================
--- Makefile	(revision 481139)
+++ Makefile	(working copy)
@@ -22,7 +22,7 @@
 USE_QT=		core qmake_build
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-zlib=system
-USES=		localbase qt:5 qt:5
+USES=		compiler:c++11-lang localbase qt:5 qt:5
 
 OPTIONS_DEFINE=	GUI
 OPTIONS_SUB=	yes