diff --git a/libmpdemux/demuxer.c b/libmpdemux/demuxer.c
index 194620730c..77770d90eb 100644
--- a/libmpdemux/demuxer.c
+++ b/libmpdemux/demuxer.c
@@ -1532,6 +1532,7 @@ extern int demux_avi_control(demuxer_t *demuxer, int cmd, void *arg);
 extern int demux_xmms_control(demuxer_t *demuxer, int cmd, void *arg);
 extern int demux_mkv_control(demuxer_t *demuxer, int cmd, void *arg);
 extern int demux_audio_control(demuxer_t *demuxer, int cmd, void *arg);
+extern int demux_real_control(demuxer_t *demuxer, int cmd, void *arg);
 
 int demux_control(demuxer_t *demuxer, int cmd, void *arg) {
     switch(demuxer->type) {