diff --git a/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat
index 03c6852ae7..3846e66552 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/JFB100/hwdef.dat
@@ -343,7 +343,7 @@ PA9 VBAS INPUT PULLDOWN
 
 # External watchdog gpio
 PH11 EXT_WDOG OUTPUT SPEED_VERYLOW
-define EXT_WDOG_INTERVAL_MS 100
+define EXT_WDOG_INTERVAL_MS 50
 
 # safety switch
 PE10 SAFETY_IN INPUT PULLUP