diff --git a/libavcodec/mscc.c b/libavcodec/mscc.c
index 027eb16085..d9a6de094a 100644
--- a/libavcodec/mscc.c
+++ b/libavcodec/mscc.c
@@ -262,7 +262,7 @@ const AVCodec ff_mscc_decoder = {
     .close            = decode_close,
     .decode           = 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,
 };
 
 const AVCodec ff_srgc_decoder = {
@@ -275,5 +275,5 @@ const AVCodec ff_srgc_decoder = {
     .close            = decode_close,
     .decode           = 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,
 };