diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 4956e3a8b7..5b59e48930 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -709,10 +709,9 @@ static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
 }
 
 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
-                                 int point_transform)
+                                 int point_transform, int nb_components)
 {
     int i, mb_x, mb_y;
-    const int nb_components = 3;
 
     for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
         for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
@@ -1094,7 +1093,8 @@ next_field:
                     return ret;
             } else {
                 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
-                                                 point_transform)) < 0)
+                                                 point_transform,
+                                                 nb_components)) < 0)
                     return ret;
             }
         }