diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 6abb5412de..b1ef344aa7 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -2027,12 +2027,12 @@ static int matroska_parse_flac(AVFormatContext *s,
 
 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
 {
-    int major, minor, micro, bttb = 0;
+    int minor, micro, bttb = 0;
 
     /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
      * this function, and fixed in 57.52 */
-    if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
-        bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
+    if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf57.%d.%d", &minor, &micro) == 2)
+        bttb = (minor >= 36 && minor <= 51 && micro >= 100);
 
     switch (field_order) {
     case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE: