diff --git a/libavcodec/ra288.c b/libavcodec/ra288.c
index 05f322c40a..4310ccdf20 100644
--- a/libavcodec/ra288.c
+++ b/libavcodec/ra288.c
@@ -246,4 +246,5 @@ const AVCodec ff_ra_288_decoder = {
     .init           = ra288_decode_init,
     .decode         = ra288_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };