diff --git a/libavcodec/opusdec.c b/libavcodec/opusdec.c
index 24e90a3761..f0d7ed62a1 100644
--- a/libavcodec/opusdec.c
+++ b/libavcodec/opusdec.c
@@ -716,5 +716,5 @@ AVCodec ff_opus_decoder = {
     .decode          = opus_decode_packet,
     .flush           = opus_decode_flush,
     .capabilities    = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_CHANNEL_CONF,
-    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
+    .caps_internal   = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };