diff --git a/subprojects/gst-plugins-bad/gst/mpegtsdemux/tsdemux.c b/subprojects/gst-plugins-bad/gst/mpegtsdemux/tsdemux.c
index a88f35efd4..26383a6c68 100644
--- a/subprojects/gst-plugins-bad/gst/mpegtsdemux/tsdemux.c
+++ b/subprojects/gst-plugins-bad/gst/mpegtsdemux/tsdemux.c
@@ -1256,7 +1256,8 @@ gst_ts_demux_create_tags (TSDemuxStream * stream)
     const GstMpegtsDescriptor *ac3_desc =
         mpegts_get_descriptor_from_stream (bstream,
         GST_MTS_DESC_AC3_AUDIO_STREAM);
-    if (ac3_desc && DESC_AC_AUDIO_STREAM_has_lang1 (ac3_desc->data)) {
+    if (ac3_desc && ac3_desc->length >= 8
+        && DESC_AC_AUDIO_STREAM_has_lang1 (ac3_desc->data)) {
       gchar lang_code[4];
 
       memcpy (lang_code, DESC_AC_AUDIO_STREAM_lang1_code (ac3_desc->data), 3);