diff --git a/src/Dirent.ts b/src/Dirent.ts
index cdfb2415..d21e70a3 100644
--- a/src/Dirent.ts
+++ b/src/Dirent.ts
@@ -8,7 +8,7 @@ const { S_IFMT, S_IFDIR, S_IFREG, S_IFBLK, S_IFCHR, S_IFLNK, S_IFIFO, S_IFSOCK }
  * A directory entry, like `fs.Dirent`.
  */
 export class Dirent {
-  static build(link: Link, encoding: TEncodingExtended) {
+  static build(link: Link, encoding: TEncodingExtended | undefined) {
     const dirent = new Dirent();
     const { mode } = link.getNode();