diff --git a/lib/storage.js b/lib/storage.js
index 3b2d09d..d179e68 100755
--- a/lib/storage.js
+++ b/lib/storage.js
@@ -71,7 +71,7 @@ storage.flushToStorageAsync = async (options) => {
    * database is loaded and a crash happens.
    */
 
-  let fd, errorOnFsync, errorOnClose
+  let fd, errorOnFsync, errorOnClose // TODO: sometimes it leaves some file descriptors open
   try {
     fd = await fsPromises.open(filename, flags)
     try {