fix gpio
diff --git a/verilog/rtl/user_defines.v b/verilog/rtl/user_defines.v
index 7628243..15da75a 100644
--- a/verilog/rtl/user_defines.v
+++ b/verilog/rtl/user_defines.v
@@ -20,7 +20,7 @@
`define __USER_DEFINES_H
// deliberately erroneous placeholder value; user required to config GPIO's to other
-`define GPIO_MODE_MGMT_STD_OUTPUT 13'hXXXX
+`define GPIO_MODE_MGMT_STD_OUTPUT 13'hffff
// Authoritive source of these MODE defs is: caravel/verilog/rtl/user_defines.v
// Useful GPIO mode values. These match the names used in defs.h.