diff --git a/libavformat/m4vdec.c b/libavformat/m4vdec.c
index d8ee530010..34d434f7d2 100644
--- a/libavformat/m4vdec.c
+++ b/libavformat/m4vdec.c
@@ -53,6 +53,9 @@ static int mpeg4video_probe(AVProbeData *probe_packet)
 
     if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res == 0)
         return VOP+VO > 4 ? AVPROBE_SCORE_EXTENSION : AVPROBE_SCORE_EXTENSION/2;
+
+    if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && VOP+VO > 4)
+        return AVPROBE_SCORE_EXTENSION/10;
     return 0;
 }