diff --git a/gst-libs/gst/rtsp/gstrtspdefs.c b/gst-libs/gst/rtsp/gstrtspdefs.c
index 4b5ea6d77d..ad7a731d87 100644
--- a/gst-libs/gst/rtsp/gstrtspdefs.c
+++ b/gst-libs/gst/rtsp/gstrtspdefs.c
@@ -183,6 +183,9 @@ static struct rtsp_header rtsp_headers[] = {
   {"Seek-Style", FALSE},
   {"Accept-Ranges", FALSE},
 
+  /* Onvif extensions */
+  {"Frames", FALSE},
+
   {NULL, FALSE}
 };
 
diff --git a/gst-libs/gst/rtsp/gstrtspdefs.h b/gst-libs/gst/rtsp/gstrtspdefs.h
index 345da9eeec..b51075c232 100644
--- a/gst-libs/gst/rtsp/gstrtspdefs.h
+++ b/gst-libs/gst/rtsp/gstrtspdefs.h
@@ -341,6 +341,9 @@ typedef enum {
   GST_RTSP_HDR_SEEK_STYLE,          /* Seek-Type          Rr     opt.      PLAY */
   GST_RTSP_HDR_ACCEPT_RANGES,       /* Accept-Ranges      Rr     opt.      SETUP, GET_PARAMETER */
 
+  /* Onvif extensions */
+  GST_RTSP_HDR_FRAMES,              /* Frames             Rr     opt.      PLAY */
+
   GST_RTSP_HDR_LAST
 } GstRTSPHeaderField;