diff --git a/libavcodec/ljpegenc.c b/libavcodec/ljpegenc.c
index 6fd86ff227..9b9f5dcf7b 100644
--- a/libavcodec/ljpegenc.c
+++ b/libavcodec/ljpegenc.c
@@ -319,6 +319,7 @@ AVCodec ff_ljpeg_encoder = {
     .init           = ljpeg_encode_init,
     .encode2        = ljpeg_encode_frame,
     .close          = ljpeg_encode_close,
+    .capabilities   = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
     .pix_fmts       = (const enum AVPixelFormat[]){
         AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,