diff --git a/litex/soc/interconnect/axi/axi_full.py b/litex/soc/interconnect/axi/axi_full.py
index 914c9b0bf..a6b5e4319 100644
--- a/litex/soc/interconnect/axi/axi_full.py
+++ b/litex/soc/interconnect/axi/axi_full.py
@@ -84,7 +84,7 @@ class AXIInterface:
         )
         self.w = AXIStreamInterface(name=name,
             layout     = w_description(data_width),
-            id_width   = {"axi3":0,"axi4":id_width}[version], # No WID on AXI4.
+            id_width   = {"axi4":0,"axi3":id_width}[version], # No WID on AXI4.
             user_width = w_user_width
         )
         self.b = AXIStreamInterface(name=name,