diff --git a/libavcodec/g722dec.c b/libavcodec/g722dec.c
index 96cf1a86f1..5ca0d0e2b1 100644
--- a/libavcodec/g722dec.c
+++ b/libavcodec/g722dec.c
@@ -149,4 +149,5 @@ const AVCodec ff_adpcm_g722_decoder = {
     .decode         = g722_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
     .priv_class     = &g722_decoder_class,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };