-#define GTK_TEXT(obj) (GTK_CHECK_CAST ((obj), GTK_TYPE_TEXT, GtkText))
-#define GTK_TEXT_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT, GtkTextClass))
-#define GTK_IS_TEXT(obj) (GTK_CHECK_TYPE ((obj), GTK_TYPE_TEXT))
-#define GTK_IS_TEXT_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT))
-#define GTK_TEXT_GET_CLASS(obj) (GTK_CHECK_GET_CLASS ((obj), GTK_TYPE_TEXT, GtkTextClass))
+#define GTK_TEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_TEXT, GtkText))
+#define GTK_TEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT, GtkTextClass))
+#define GTK_IS_TEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_TEXT))
+#define GTK_IS_TEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT))
+#define GTK_TEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TEXT, GtkTextClass))