-#define GTK_CUSTOM_HRULER(obj) GTK_CHECK_CAST (obj, gtk_custom_hruler_get_type (), GtkCustomHRuler)
-#define GTK_CUSTOM_HRULER_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gtk_custom_hruler_get_type (), GtkCustomHRulerClass)
-#define GTK_IS_CUSTOM_HRULER(obj) GTK_CHECK_TYPE (obj, gtk_custom_hruler_get_type ())
+#define GTK_CUSTOM_HRULER(obj) G_TYPE_CHECK_INSTANCE_CAST (obj, gtk_custom_hruler_get_type (), GtkCustomHRuler)
+#define GTK_CUSTOM_HRULER_CLASS(klass) G_TYPE_CHECK_CLASS_CAST (klass, gtk_custom_hruler_get_type (), GtkCustomHRulerClass)
+#define GTK_IS_CUSTOM_HRULER(obj) G_TYPE_CHECK_INSTANCE_TYPE (obj, gtk_custom_hruler_get_type ())