Index: Makefile
===================================================================
--- Makefile	(revision 488727)
+++ Makefile	(working copy)
@@ -14,7 +14,7 @@
 
 LIB_DEPENDS=	libpoppler-qt5.so:graphics/poppler-qt5
 
-USES=		pkgconfig pyqt:5 python:3.4+ qmake qt:5
+USES=		compiler:c++11-lang pkgconfig pyqt:5 python:3.4+ qmake qt:5
 USE_PYQT=	gui xml sip_build
 USE_PYTHON=	distutils autoplist
 USE_GITHUB=	yes