Index: tools/mktmpfs.py
===================================================================
--- tools/mktmpfs.py	(revision 28f4adbc5088d8d67ea408f56eb3b35838031e6a)
+++ tools/mktmpfs.py	(revision d0110381e3e00b2383e99221c0726056fa4e3985)
@@ -80,5 +80,5 @@
 			dentry.kind = TMPFS_FILE
 			dentry.fname_len = len(name)
-			dentry.fname = name
+			dentry.fname = name.encode('ascii')
 			dentry.flen = size
 			
@@ -97,5 +97,5 @@
 			dentry.kind = TMPFS_DIRECTORY
 			dentry.fname_len = len(name)
-			dentry.fname = name
+			dentry.fname = name.encode('ascii')
 			
 			outf.write(dentry.pack())
@@ -122,5 +122,5 @@
 	
 	header = xstruct.create(HEADER)
-	header.tag = "TMPFS"
+	header.tag = b"TMPFS"
 	
 	outf.write(header.pack())