diff --git a/libavcodec/exrenc.c b/libavcodec/exrenc.c
index b2cb9c4205..207a335f44 100644
--- a/libavcodec/exrenc.c
+++ b/libavcodec/exrenc.c
@@ -549,4 +549,5 @@ const AVCodec ff_exr_encoder = {
                                                  AV_PIX_FMT_GBRPF32,
                                                  AV_PIX_FMT_GBRAPF32,
                                                  AV_PIX_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };