diff --git a/gst/gstbuffer.h b/gst/gstbuffer.h
index 4ad4c9e696..61b1273527 100644
--- a/gst/gstbuffer.h
+++ b/gst/gstbuffer.h
@@ -285,6 +285,8 @@ struct _GstBuffer {
   GFreeFunc              free_func;
   GstBuffer             *parent;
 
+  gpointer               owner_priv;
+
   /*< private >*/
   gpointer _gst_reserved[GST_PADDING];
 };