Index: Makefile
===================================================================
--- Makefile	(revision 482837)
+++ Makefile	(working copy)
@@ -21,7 +21,7 @@
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS+=	--enable-introspection=yes \
 			--enable-vala=yes
-USES=		gmake libtool:build pathfix pkgconfig tar:xz
+USES=		compiler:c++11-lang gmake libtool:build pathfix pkgconfig tar:xz
 USE_GNOME=	glib20 introspection:build
 USE_LDCONFIG=	yes
 MAKE_ARGS=	REQUIRED_CFLAGS="" ENABLE_INTROSPECTION=1