Index: Makefile
===================================================================
--- Makefile	(revision 481501)
+++ Makefile	(working copy)
@@ -20,7 +20,7 @@
 GH_ACCOUNT=	hmatuschek
 
 USE_QT=		core buildtools_build qmake widgets
-USES=		cmake pkgconfig qt:5
+USES=		cmake compiler:c++11-lang pkgconfig qt:5
 USE_LDCONFIG=	yes
 
 .include <bsd.port.mk>