diff --git a/litex/soc/interconnect/packet.py b/litex/soc/interconnect/packet.py
index 348875ac2..123a587e1 100644
--- a/litex/soc/interconnect/packet.py
+++ b/litex/soc/interconnect/packet.py
@@ -101,7 +101,7 @@ class Dispatcher(LiteXModule):
 # Header -------------------------------------------------------------------------------------------
 
 class HeaderField:
-    def __init__(self, byte, offset, width):
+    def __init__(self, byte=0, offset=0, width=1):
         self.byte   = byte
         self.offset = offset
         self.width  = width