diff --git a/libavcodec/cljrdec.c b/libavcodec/cljrdec.c
index 4b187f8cf3..c41df12d53 100644
--- a/libavcodec/cljrdec.c
+++ b/libavcodec/cljrdec.c
@@ -90,5 +90,6 @@ AVCodec ff_cljr_decoder = {
     .init           = decode_init,
     .decode         = decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };