diff --git a/libavcodec/ffv1enc.c b/libavcodec/ffv1enc.c
index 98abd936cd..4df10d3e75 100644
--- a/libavcodec/ffv1enc.c
+++ b/libavcodec/ffv1enc.c
@@ -1310,5 +1310,5 @@ const AVCodec ff_ffv1_encoder = {
 
     },
     .priv_class     = &ffv1_class,
-    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };