Index: Makefile
===================================================================
--- Makefile	(revision 487620)
+++ Makefile	(working copy)
@@ -18,7 +18,7 @@
 		libvisa.so:devel/librevisa \
 		libzip.so:archivers/libzip
 
-USES=		gnome pathfix libtool pkgconfig
+USES=		compiler:c11 gnome pathfix libtool pkgconfig
 
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip