diff --git a/cinelerra-5.1/cinelerra/ffmpeg.C b/cinelerra-5.1/cinelerra/ffmpeg.C
index ec0640a5..b863b8b3 100644
--- a/cinelerra-5.1/cinelerra/ffmpeg.C
+++ b/cinelerra-5.1/cinelerra/ffmpeg.C
@@ -433,6 +433,7 @@ int FFStream::decode_activate()
 				avcodec_parameters_to_context(avctx, st->codecpar);
 				if( !av_dict_get(copts, "threads", NULL, 0) )
 					avctx->thread_count = ffmpeg->ff_cpus();
+				avctx->workaround_bugs = FF_BUG_AUTODETECT;
 				ret = avcodec_open2(avctx, decoder, &copts);
 			}
 			AVFrame *hw_frame = 0;