diff --git a/gst-libs/gst/mpegts/gst-dvb-descriptor.h b/gst-libs/gst/mpegts/gst-dvb-descriptor.h
index 07678c4751..b03f3283e2 100644
--- a/gst-libs/gst/mpegts/gst-dvb-descriptor.h
+++ b/gst-libs/gst/mpegts/gst-dvb-descriptor.h
@@ -849,7 +849,7 @@ typedef struct _GstMpegtsT2DeliverySystemCell GstMpegtsT2DeliverySystemCell;
 /**
  * GstMpegtsT2DeliverySystemCell:
  * @cell_id: id of the cell
- * @centre_frequencies: centre frequencies in Hz
+ * @centre_frequencies: (element-type guint32): centre frequencies in Hz
  * @sub_cells: (element-type GstMpegtsT2DeliverySystemCellExtension):
  */
 struct _GstMpegtsT2DeliverySystemCell