diff --git a/libavcodec/escape124.c b/libavcodec/escape124.c
index 3b514e7eb0..ab5c8d2243 100644
--- a/libavcodec/escape124.c
+++ b/libavcodec/escape124.c
@@ -386,4 +386,5 @@ const AVCodec ff_escape124_decoder = {
     .close          = escape124_decode_close,
     .decode         = escape124_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };