Index: Makefile
===================================================================
--- Makefile	(revision 498040)
+++ Makefile	(working copy)
@@ -17,7 +17,7 @@
 		libgoocanvas-2.0.so:graphics/goocanvas2 \
 		libgps.so:astro/gpsd
 
-USES=		gettext gmake pkgconfig tar:bz2
+USES=		compiler:c11 gettext gmake gnome pkgconfig tar:bz2
 GNU_CONFIGURE=	yes
 USE_GNOME=	cairo gdkpixbuf2 gtk30 intltool