diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index b72d6805b7..8298298f23 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -698,7 +698,8 @@ static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
                                     int16_t *quant_matrix,
                                     int ss, int se, int Al, int *EOBRUN)
 {
-    int code, i, j, level, val, run;
+    int code, i, j, val, run;
+    unsigned level;
 
     if (*EOBRUN) {
         (*EOBRUN)--;