1 files changed, 3 insertions, 3 deletions
diff --git a/demux/demux_mkv.c b/demux/demux_mkv.c
index add99a9c2d..b040c45f23 100644
--- a/demux/demux_mkv.c
+++ b/demux/demux_mkv.c
@@ -3123,12 +3123,12 @@ static int demux_mkv_control(demuxer_t *demuxer, int cmd, void *arg)
     switch (cmd) {
     case DEMUXER_CTRL_GET_TIME_LENGTH:
         if (mkv_d->duration == 0)
-            return DEMUXER_CTRL_DONTKNOW;
+            return CONTROL_FALSE;
 
         *((double *) arg) = (double) mkv_d->duration;
-        return DEMUXER_CTRL_OK;
+        return CONTROL_OK;
     default:
-        return DEMUXER_CTRL_NOTIMPL;
+        return CONTROL_UNKNOWN;
     }
 }