-#define GTK_ASPECT_FRAME(obj) (GTK_CHECK_CAST ((obj), GTK_TYPE_ASPECT_FRAME, GtkAspectFrame))
-#define GTK_ASPECT_FRAME_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_ASPECT_FRAME, GtkAspectFrameClass))
-#define GTK_IS_ASPECT_FRAME(obj) (GTK_CHECK_TYPE ((obj), GTK_TYPE_ASPECT_FRAME))
-#define GTK_IS_ASPECT_FRAME_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_ASPECT_FRAME))
-
+#define GTK_ASPECT_FRAME(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_ASPECT_FRAME, GtkAspectFrame))
+#define GTK_ASPECT_FRAME_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_ASPECT_FRAME, GtkAspectFrameClass))
+#define GTK_IS_ASPECT_FRAME(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_ASPECT_FRAME))
+#define GTK_IS_ASPECT_FRAME_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_ASPECT_FRAME))
+#define GTK_ASPECT_FRAME_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_ASPECT_FRAME, GtkAspectFrameClass))