-#define GTK_SEPARATOR_MENU_ITEM(obj) (GTK_CHECK_CAST ((obj), GTK_TYPE_SEPARATOR_MENU_ITEM, GtkSeparatorMenuItem))
-#define GTK_SEPARATOR_MENU_ITEM_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_SEPARATOR_MENU_ITEM, GtkSeparatorMenuItemClass))
-#define GTK_IS_SEPARATOR_MENU_ITEM(obj) (GTK_CHECK_TYPE ((obj), GTK_TYPE_SEPARATOR_MENU_ITEM))
-#define GTK_IS_SEPARATOR_MENU_ITEM_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_SEPARATOR_MENU_ITEM))
-#define GTK_SEPARATOR_MENU_ITEM_GET_CLASS(obj) (GTK_CHECK_GET_CLASS ((obj), GTK_TYPE_SEPARATOR_MENU_ITEM, GtkSeparatorMenuItemClass))
+#define GTK_SEPARATOR_MENU_ITEM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SEPARATOR_MENU_ITEM, GtkSeparatorMenuItem))
+#define GTK_SEPARATOR_MENU_ITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_SEPARATOR_MENU_ITEM, GtkSeparatorMenuItemClass))
+#define GTK_IS_SEPARATOR_MENU_ITEM(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SEPARATOR_MENU_ITEM))
+#define GTK_IS_SEPARATOR_MENU_ITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_SEPARATOR_MENU_ITEM))
+#define GTK_SEPARATOR_MENU_ITEM_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_SEPARATOR_MENU_ITEM, GtkSeparatorMenuItemClass))