diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c
index 4a42360388..044e4798b7 100644
--- a/libavcodec/dnxhddec.c
+++ b/libavcodec/dnxhddec.c
@@ -73,6 +73,7 @@ static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
 
     ctx->avctx = avctx;
     ctx->cid = -1;
+    avctx->colorspace = AVCOL_SPC_BT709;
     return 0;
 }