diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index b5fb825102..358da1701f 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -637,12 +637,14 @@ static int read_header(FFV1Context *f)
             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
             }
         } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
+            f->packed_at_lsb = 1;
             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
             }
         } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
+            f->packed_at_lsb = 1;
             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;