diff --git a/libavcodec/8svx.c b/libavcodec/8svx.c
index 54ad806ec9..6ef8cd73fe 100644
--- a/libavcodec/8svx.c
+++ b/libavcodec/8svx.c
@@ -196,6 +196,7 @@ const AVCodec ff_eightsvx_fib_decoder = {
   .capabilities   = AV_CODEC_CAP_DR1,
   .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
                                                     AV_SAMPLE_FMT_NONE },
+  .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };
 #endif
 #if CONFIG_EIGHTSVX_EXP_DECODER
@@ -211,5 +212,6 @@ const AVCodec ff_eightsvx_exp_decoder = {
   .capabilities   = AV_CODEC_CAP_DR1,
   .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
                                                     AV_SAMPLE_FMT_NONE },
+  .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };
 #endif