1 files changed, 1 insertions, 0 deletions
diff --git a/sub/sd.h b/sub/sd.h
index 7b2399056a..a77028a43c 100644
--- a/sub/sd.h
+++ b/sub/sd.h
@@ -28,6 +28,7 @@ struct sd {
     // Shared renderer for ASS - done to avoid reloading embedded fonts.
     struct ass_library *ass_library;
     struct ass_renderer *ass_renderer;
+    pthread_mutex_t *ass_lock;
 
     // If false, try to remove multiple subtitles.
     // (Only for decoders which have accept_packets_in_advance set.)