-#define LAYER(class) synfig::Layer::register_in_book(synfig::Layer::BookEntry(class::create,class::name__,class::local_name__,class::category__,class::cvs_id__,class::version__));
-#define LAYER_ALIAS(class,alias) synfig::Layer::register_in_book(synfig::Layer::BookEntry(class::create,alias,alias,_("Do Not Use"),class::cvs_id__,class::version__));
+#define LAYER_ALIAS(class,alias) synfig::Layer::register_in_book(synfig::Layer::BookEntry(class::create,alias,alias,CATEGORY_DO_NOT_USE,class::cvs_id__,class::version__));