diff --git a/libavcodec/v308dec.c b/libavcodec/v308dec.c
index c2b0a69561..d059474b36 100644
--- a/libavcodec/v308dec.c
+++ b/libavcodec/v308dec.c
@@ -80,4 +80,5 @@ const AVCodec ff_v308_decoder = {
     .init         = v308_decode_init,
     .decode       = v308_decode_frame,
     .capabilities = AV_CODEC_CAP_DR1,
+    .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
 };