diff --git a/mibuild/platforms/pipistrello.py b/mibuild/platforms/pipistrello.py
index 0b5106043..127f609c6 100644
--- a/mibuild/platforms/pipistrello.py
+++ b/mibuild/platforms/pipistrello.py
@@ -23,10 +23,10 @@ _io = [
 
     ("usb_fifo", 0,
         Subsignal("data", Pins("A11 A10 C10 A9 B9 A8 B8 A7")),
-        Subsignal("rxf", Pins("C7")),
-        Subsignal("txe", Pins("A6")),
-        Subsignal("rd", Pins("B6")),
-        Subsignal("wr", Pins("A5")),
+        Subsignal("rxf_n", Pins("C7")),
+        Subsignal("txe_n", Pins("A6")),
+        Subsignal("rd_n", Pins("B6")),
+        Subsignal("wr_n", Pins("A5")),
         Subsignal("siwua", Pins("C5")),
         IOStandard("LVTTL"),
     ),