diff --git a/libavcodec/msrle.c b/libavcodec/msrle.c
index bbac2a3ffb..b6f80653c1 100644
--- a/libavcodec/msrle.c
+++ b/libavcodec/msrle.c
@@ -170,4 +170,5 @@ const AVCodec ff_msrle_decoder = {
     .decode         = msrle_decode_frame,
     .flush          = msrle_decode_flush,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };