diff --git a/libavcodec/flacenc.c b/libavcodec/flacenc.c
index b8d0e10631..a80f0f9fe3 100644
--- a/libavcodec/flacenc.c
+++ b/libavcodec/flacenc.c
@@ -1387,7 +1387,7 @@ AVCodec ff_flac_encoder = {
     flac_encode_frame,
     flac_encode_close,
     NULL,
-    .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY,
+    .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY | CODEC_CAP_LOSSLESS,
     .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
     .long_name = NULL_IF_CONFIG_SMALL("FLAC (Free Lossless Audio Codec)"),
     .priv_class = &flac_encoder_class,