diff --git a/libavcodec/vb.c b/libavcodec/vb.c
index f5b7f89853..eac2427ce3 100644
--- a/libavcodec/vb.c
+++ b/libavcodec/vb.c
@@ -288,5 +288,5 @@ const AVCodec ff_vb_decoder = {
     .close          = decode_end,
     .decode         = decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
-    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };