diff --git a/libavcodec/mjpegbdec.c b/libavcodec/mjpegbdec.c
index 37d7bb8228..70ff4cf563 100644
--- a/libavcodec/mjpegbdec.c
+++ b/libavcodec/mjpegbdec.c
@@ -56,6 +56,7 @@ static int mjpegb_decode_frame(AVCodecContext *avctx,
     buf_ptr = buf;
     buf_end = buf + buf_size;
     s->got_picture = 0;
+    s->adobe_transform = -1;
 
 read_header:
     /* reset on every SOI */