diff --git a/nmigen/back/verilog.py b/nmigen/back/verilog.py
index 5c8e08d..249075d 100644
--- a/nmigen/back/verilog.py
+++ b/nmigen/back/verilog.py
@@ -28,7 +28,7 @@ proc_arst
 proc_dff
 proc_clean
 memory_collect
-write_verilog
+write_verilog -norename
 # Make sure there are no undriven wires in generated RTLIL.
 proc
 select -assert-none w:* i:* %a %d o:* %a %ci* %d c:* %co* %a %d n:$* %d