diff --git a/litepcie/tlp/packetizer.py b/litepcie/tlp/packetizer.py
index c752f4a..a0e4891 100644
--- a/litepcie/tlp/packetizer.py
+++ b/litepcie/tlp/packetizer.py
@@ -2,6 +2,7 @@
 # This file is part of LitePCIe.
 #
 # Copyright (c) 2015-2023 Florent Kermarrec <florent@enjoy-digital.fr>
+# Copyright (c) 2024 John Simons <jammsimons@gmail.com>
 # SPDX-License-Identifier: BSD-2-Clause
 
 from migen import *
@@ -804,7 +805,7 @@ def __init__(self, data_width, endianness, address_width=32, capabilities=["REQU
 
             # On Ultrascale(+) / 256-bit, force to 64-bit (for 4DWs format).
             try:
-                force_64b = (LiteXContext.platform.device[:4] in ["xcku", "xcvu", "xczu"]) and (data_width in [256])
+                force_64b = (LiteXContext.platform.device[:4] in ["xcku", "xcvu", "xczu", 'xcau']) and (data_width in [256])
             except:
                 force_64b = False