diff --git a/libavcodec/magicyuvenc.c b/libavcodec/magicyuvenc.c
index 7edaf1b45e..a61d8555d9 100644
--- a/libavcodec/magicyuvenc.c
+++ b/libavcodec/magicyuvenc.c
@@ -572,5 +572,5 @@ const AVCodec ff_magicyuv_encoder = {
                           AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_GRAY8,
                           AV_PIX_FMT_NONE
                       },
-    .caps_internal    = FF_CODEC_CAP_INIT_CLEANUP,
+    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };