diff --git a/libavcodec/ttaenc.c b/libavcodec/ttaenc.c
index 3255347b62..8f8afdd338 100644
--- a/libavcodec/ttaenc.c
+++ b/libavcodec/ttaenc.c
@@ -214,4 +214,5 @@ const AVCodec ff_tta_encoder = {
                                                      AV_SAMPLE_FMT_S16,
                                                      AV_SAMPLE_FMT_S32,
                                                      AV_SAMPLE_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };