diff --git a/mpcommon.h b/mpcommon.h
index c3c5b6dd29..49c450ae2b 100644
--- a/mpcommon.h
+++ b/mpcommon.h
@@ -4,3 +4,4 @@ extern ass_track_t *ass_track;
 #endif
 extern subtitle *vo_sub_last;
 void update_subtitles(sh_video_t *sh_video, demux_stream_t *d_dvdsub, int reset);
+void update_teletext(sh_video_t *sh_video, demuxer_t *demuxer, int reset);