diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index d7ef0067b5..ba0e714f2b 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -734,7 +734,7 @@ static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
                                  int component, int dc_index,
                                  int16_t *quant_matrix, int Al)
 {
-    int val;
+    unsigned val;
     s->bdsp.clear_block(block);
     val = mjpeg_decode_dc(s, dc_index);
     if (val == 0xfffff) {