diff --git a/ffmpeg.c b/ffmpeg.c
index dcad55a074..017679ca8a 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -3577,6 +3577,10 @@ static void new_subtitle_stream(AVFormatContext *oc, int file_idx)
     if(subtitle_codec_tag)
         subtitle_enc->codec_tag= subtitle_codec_tag;
 
+    if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
+        subtitle_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
+        avcodec_opts[AVMEDIA_TYPE_SUBTITLE]->flags |= CODEC_FLAG_GLOBAL_HEADER;
+    }
     if (subtitle_stream_copy) {
         st->stream_copy = 1;
     } else {