Index: Makefile
===================================================================
--- Makefile	(revision 497616)
+++ Makefile	(working copy)
@@ -10,7 +10,8 @@
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-USES=		cmake pkgconfig libtool localbase:ldflags
+USES=		cmake compiler:c++11-lang gnome libtool localbase:ldflags \
+		pkgconfig
 USE_GNOME=	gtkmm30 libsigc++20
 
 INSTALLS_ICONS=	yes