diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index e3f6910925..b350f4473d 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -440,14 +440,15 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
         av_assert0(s->nb_components == 4);
         break;
     case 0x22111122:
+    case 0x22111111:
         if (s->adobe_transform == 0 && s->bits <= 8) {
             s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
-            s->upscale_v = 6;
-            s->upscale_h = 6;
+            s->upscale_v |= 6;
+            s->upscale_h |= 6;
         } else if (s->adobe_transform == 2 && s->bits <= 8) {
             s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
-            s->upscale_v = 6;
-            s->upscale_h = 6;
+            s->upscale_v |= 6;
+            s->upscale_h |= 6;
             s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
         } else {
             if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;