diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c
index 2efe7e192e..e3b71f7bb1 100644
--- a/libavcodec/ffv1.c
+++ b/libavcodec/ffv1.c
@@ -673,6 +673,10 @@ static av_cold int encode_init(AVCodecContext *avctx)
             av_log(avctx, AV_LOG_ERROR, "bits_per_raw_sample invalid\n");
             return -1;
         }
+        if(!s->ac){
+            av_log(avctx, AV_LOG_ERROR, "bits_per_raw_sample of more than 8 needs -coder 1 currently\n");
+            return -1;
+        }
         s->version= 1;
     case PIX_FMT_YUV444P:
     case PIX_FMT_YUV422P: