diff --git a/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat
index d7df5bf7c2..03c6852ae7 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat
@@ -341,9 +341,9 @@ PG15 WA8 INPUT PULLUP
 # now we define the pins that USB is connected on
 PA9 VBAS INPUT PULLDOWN
 
-# External watchdog timer clear
-PH11 WDI_OUT OUTPUT SPEED_VERYLOW
-define WDI_OUT_INTERVAL_TIME_MS 100
+# External watchdog gpio
+PH11 EXT_WDOG OUTPUT SPEED_VERYLOW
+define EXT_WDOG_INTERVAL_MS 100
 
 # safety switch
 PE10 SAFETY_IN INPUT PULLUP