diff --git a/gst-libs/gst/codecparsers/gsth264parser.c b/gst-libs/gst/codecparsers/gsth264parser.c
index 4af4d44f96..320777b0b0 100644
--- a/gst-libs/gst/codecparsers/gsth264parser.c
+++ b/gst-libs/gst/codecparsers/gsth264parser.c
@@ -704,9 +704,12 @@ gst_h264_slice_parse_dec_ref_pic_marking (GstH264SliceHdr * slice,
     GstH264NalUnit * nalu, NalReader * nr)
 {
   GstH264DecRefPicMarking *dec_ref_pic_m;
+  guint start_pos;
 
   GST_DEBUG ("parsing \"Decoded reference picture marking\"");
 
+  start_pos = nal_reader_get_pos (nr);
+
   dec_ref_pic_m = &slice->dec_ref_pic_marking;
 
   if (nalu->idr_pic_flag) {
@@ -746,6 +749,8 @@ gst_h264_slice_parse_dec_ref_pic_marking (GstH264SliceHdr * slice,
     }
   }
 
+  dec_ref_pic_m->bit_size = nal_reader_get_pos (nr) - start_pos;
+
   return TRUE;
 
 error:
diff --git a/gst-libs/gst/codecparsers/gsth264parser.h b/gst-libs/gst/codecparsers/gsth264parser.h
index dda51d6da9..9670be5c95 100644
--- a/gst-libs/gst/codecparsers/gsth264parser.h
+++ b/gst-libs/gst/codecparsers/gsth264parser.h
@@ -867,6 +867,9 @@ struct _GstH264DecRefPicMarking
   guint8 adaptive_ref_pic_marking_mode_flag;
   GstH264RefPicMarking ref_pic_marking[10];
   guint8 n_ref_pic_marking;
+
+  /* Size of the dec_ref_pic_marking() syntax element in bits (Since: 1.18) */
+  guint bit_size;
 };