diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 5ce2a541da..5e4552a09c 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -618,7 +618,7 @@ static int mkv_write_tracks(AVFormatContext *s)
                 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_SUBTITLE);
                 if (!native_id) {
                     av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
-                    return AVERROR_NOTSUPP;
+                    return AVERROR(EINVAL);
                 }
                 break;
             default: