diff --git a/libavcodec/huffyuvenc.c b/libavcodec/huffyuvenc.c
index c7e69d5cee..f0179dfa5b 100644
--- a/libavcodec/huffyuvenc.c
+++ b/libavcodec/huffyuvenc.c
@@ -1080,6 +1080,8 @@ AVCodec ff_huffyuv_encoder = {
         AV_PIX_FMT_YUV422P, AV_PIX_FMT_RGB24,
         AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
     },
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
+                      FF_CODEC_CAP_INIT_CLEANUP,
 };
 
 #if CONFIG_FFVHUFF_ENCODER
@@ -1112,5 +1114,7 @@ AVCodec ff_ffvhuff_encoder = {
         AV_PIX_FMT_RGB24,
         AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
     },
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
+                      FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif