--- Makefile	(revision 483039)
+++ Makefile	(working copy)
@@ -10,7 +10,7 @@ 
 BUILD_DEPENDS=	${LOCALBASE}/share/xsl/docbook/html/docbook.xsl:textproc/docbook-xsl \
 		docbook-xml>0:textproc/docbook-xml
 
-USES=		cmake:outsource gettext kde:5 qt:5 tar:xz
+USES=		cmake:outsource compiler:c++11-lang gettext kde:5 qt:5 tar:xz
 USE_KDE=	auth archive codecs completion config configwidgets coreaddons \
 		doctools ecm i18n jobwidgets kio newstuff service widgetsaddons
 USE_QT=		core dbus gui network testlib widgets xml \