diff --git a/libavcodec/eacmv.c b/libavcodec/eacmv.c
index 6c4a85214f..572eb8e1bb 100644
--- a/libavcodec/eacmv.c
+++ b/libavcodec/eacmv.c
@@ -240,5 +240,5 @@ const AVCodec ff_eacmv_decoder = {
     .close          = cmv_decode_end,
     .decode         = cmv_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
-    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };