diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c
index db35d917a9..47ca77f62e 100644
--- a/libavcodec/flicvideo.c
+++ b/libavcodec/flicvideo.c
@@ -1112,4 +1112,5 @@ const AVCodec ff_flic_decoder = {
     .close          = flic_decode_end,
     .decode         = flic_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };