diff --git a/libavcodec/idcinvideo.c b/libavcodec/idcinvideo.c
index 6b2d8087ae..941a89d36d 100644
--- a/libavcodec/idcinvideo.c
+++ b/libavcodec/idcinvideo.c
@@ -258,4 +258,5 @@ AVCodec ff_idcin_decoder = {
     .decode         = idcin_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
     .defaults       = idcin_defaults,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };