diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
index 321189f38fa21864826453f721a59f2e46abb300..c3c2cf3640bb69d4892523302c9675a8c8a0ec87 100644
--- a/libavformat/img2dec.c
+++ b/libavformat/img2dec.c
@@ -756,7 +756,7 @@ static int jpeg_probe(AVProbeData *p)
     if (state == EOI)
         return AVPROBE_SCORE_EXTENSION + 1;
     if (state == SOS)
-        return AVPROBE_SCORE_EXTENSION / 2 + 1;
+        return AVPROBE_SCORE_EXTENSION / 2;
     return AVPROBE_SCORE_EXTENSION / 8;
 }