diff --git a/libavcodec/smc.c b/libavcodec/smc.c
index 2beb1ce291..342ebb71d1 100644
--- a/libavcodec/smc.c
+++ b/libavcodec/smc.c
@@ -484,4 +484,5 @@ AVCodec ff_smc_decoder = {
     .close          = smc_decode_end,
     .decode         = smc_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };