-#define GTK_SOCKET(obj) (GTK_CHECK_CAST ((obj), GTK_TYPE_SOCKET, GtkSocket))
-#define GTK_SOCKET_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_SOCKET, GtkSocketClass))
-#define GTK_IS_SOCKET(obj) (GTK_CHECK_TYPE ((obj), GTK_TYPE_SOCKET))
-#define GTK_IS_SOCKET_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_SOCKET))
-#define GTK_SOCKET_GET_CLASS(obj) (GTK_CHECK_GET_CLASS ((obj), GTK_TYPE_SOCKET, GtkSocketClass))
+#define GTK_SOCKET(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SOCKET, GtkSocket))
+#define GTK_SOCKET_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_SOCKET, GtkSocketClass))
+#define GTK_IS_SOCKET(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SOCKET))
+#define GTK_IS_SOCKET_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_SOCKET))
+#define GTK_SOCKET_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_SOCKET, GtkSocketClass))