Index: Makefile
===================================================================
--- Makefile	(revision 482837)
+++ 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 codecs config configwidgets coreaddons crash  ecm bookmarks \
 		doctools i18n widgetsaddons xmlgui
 USE_QT=		core dbus gui widgets xml \