diff --git a/sim/fakes/utarfile.py b/sim/fakes/utarfile.py
index d3dca7651196ee3f2a2de661ac6bc54e8c44cfa4..706b1b0bf0025bde97bbf409c2c66b0c583d71bd 100644
--- a/sim/fakes/utarfile.py
+++ b/sim/fakes/utarfile.py
@@ -1,8 +1,8 @@
 from typing import Any
 import tarfile
 
-DIRTYPE = "dir"
-REGTYPE = "file"
+DIRTYPE = b"5"
+REGTYPE = b"0"
 
 TarInfo = tarfile.TarInfo
 TarFile = tarfile.TarFile