diff --git a/gst-libs/gst/codecparsers/gstav1parser.c b/gst-libs/gst/codecparsers/gstav1parser.c
index 6f6b74125c..0873612145 100644
--- a/gst-libs/gst/codecparsers/gstav1parser.c
+++ b/gst-libs/gst/codecparsers/gstav1parser.c
@@ -4355,9 +4355,14 @@ gst_av1_parse_frame_header (GstAV1Parser * parser, GstAV1OBU * obu,
     GstBitReader * bit_reader, GstAV1FrameHeaderOBU * frame_header)
 {
   GstAV1ParserResult ret;
+  guint i;
 
   memset (frame_header, 0, sizeof (*frame_header));
   frame_header->frame_is_intra = 1;
+  frame_header->last_frame_idx = -1;
+  frame_header->gold_frame_idx = -1;
+  for (i = 0; i < GST_AV1_REFS_PER_FRAME; i++)
+    frame_header->ref_frame_idx[i] = -1;
 
   ret = gst_av1_parse_uncompressed_frame_header (parser, obu, bit_reader,
       frame_header);
diff --git a/gst-libs/gst/codecparsers/gstav1parser.h b/gst-libs/gst/codecparsers/gstav1parser.h
index bdbe3e11a3..e4bcc438b1 100644
--- a/gst-libs/gst/codecparsers/gstav1parser.h
+++ b/gst-libs/gst/codecparsers/gstav1parser.h
@@ -1516,7 +1516,7 @@ struct _GstAV1FilmGrainParams {
  */
 struct _GstAV1FrameHeaderOBU {
   gboolean show_existing_frame;
-  guint8 frame_to_show_map_idx;
+  gint8 frame_to_show_map_idx;
   guint32 frame_presentation_time;
   guint32 tu_presentation_delay;
   guint32 display_frame_id;
@@ -1538,8 +1538,8 @@ struct _GstAV1FrameHeaderOBU {
   gboolean allow_intrabc;
   gboolean frame_refs_short_signaling;
   guint8 last_frame_idx;
-  guint8 gold_frame_idx;
-  guint8 ref_frame_idx[GST_AV1_REFS_PER_FRAME];
+  gint8 gold_frame_idx;
+  gint8 ref_frame_idx[GST_AV1_REFS_PER_FRAME];
   gboolean allow_high_precision_mv;
   gboolean is_motion_mode_switchable;
   gboolean use_ref_frame_mvs;
@@ -1636,7 +1636,7 @@ struct _GstAV1TileListOBU {
   guint8 output_frame_height_in_tiles_minus_1;
   guint16 tile_count_minus_1;
   struct {
-    guint8 anchor_frame_idx;
+    gint8 anchor_frame_idx;
     guint8 anchor_tile_row;
     guint8 anchor_tile_col;
     guint16 tile_data_size_minus_1;