diff --git a/gst/volume/gstvolume.h b/gst/volume/gstvolume.h
index 0b0466d0fa..27cd6c3e37 100644
--- a/gst/volume/gstvolume.h
+++ b/gst/volume/gstvolume.h
@@ -32,19 +32,8 @@
 
 G_BEGIN_DECLS
 
-#define GST_TYPE_VOLUME \
-  (gst_volume_get_type())
-#define GST_VOLUME(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VOLUME,GstVolume))
-#define GST_VOLUME_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VOLUME,GstVolumeClass))
-#define GST_IS_VOLUME(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VOLUME))
-#define GST_IS_VOLUME_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VOLUME))
-
-typedef struct _GstVolume GstVolume;
-typedef struct _GstVolumeClass GstVolumeClass;
+#define GST_TYPE_VOLUME (gst_volume_get_type())
+G_DECLARE_FINAL_TYPE (GstVolume, gst_volume, GST, VOLUME, GstAudioFilter)
 
 /**
  * GstVolume:
@@ -77,12 +66,6 @@ struct _GstVolume {
   guint volumes_count;
 };
 
-struct _GstVolumeClass {
-  GstAudioFilterClass parent_class;
-};
-
-GType gst_volume_get_type (void);
-
 G_END_DECLS
 
 #endif /* __GST_VOLUME_H__ */