diff --git a/libavcodec/arbc.c b/libavcodec/arbc.c
index c4fc30e047..0f83a68758 100644
--- a/libavcodec/arbc.c
+++ b/libavcodec/arbc.c
@@ -223,5 +223,5 @@ const AVCodec ff_arbc_decoder = {
     .flush          = decode_flush,
     .close          = decode_close,
     .capabilities   = AV_CODEC_CAP_DR1,
-    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };