diff --git a/machfs/main.py b/machfs/main.py
index 1e90fe9..ccb4d0d 100644
--- a/machfs/main.py
+++ b/machfs/main.py
@@ -338,7 +338,7 @@ class Volume(directory.AbstractFolder):
             wrap.path = path
             wrap.cnid = drNxtCNID; drNxtCNID += 1
 
-            if isinstance(obj, File) and obj.type == b'ZSYS':
+            if isinstance(obj, File) and obj.type.upper() == b'ZSYS':
                 try:
                     sysname = path[-1]