diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index d4659657c3..4a054eec22 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -1211,7 +1211,8 @@ start_sync:
         if ((d[0] == 'i' && d[1] == 'x' && n < s->nb_streams) ||
             // parse JUNK
             (d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K') ||
-            (d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')) {
+            (d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1') ||
+            (d[0] == 'i' && d[1] == 'n' && d[2] == 'd' && d[3] == 'x')) {
             avio_skip(pb, size);
             goto start_sync;
         }