diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat
index 46b4ac476a7ef..48921930f7914 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F405/hwdef.dat
@@ -19,9 +19,6 @@ env AP_PERIPH 1
 define STM32_ST_USE_TIMER 5
 define CH_CFG_ST_RESOLUTION 32
 
-# enable watchdog
-define HAL_WATCHDOG_ENABLED_DEFAULT true
-
 # crystal frequency
 OSCILLATOR_HZ 16000000
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F412/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F412/hwdef.dat
index 840e642e23e05..ec933521d9ff9 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F412/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F412/hwdef.dat
@@ -20,9 +20,6 @@ env AP_PERIPH 1
 
 STM32_ST_USE_TIMER 5
 
-# enable watchdog
-define HAL_WATCHDOG_ENABLED_DEFAULT true
-
 # crystal frequency
 OSCILLATOR_HZ 16000000
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat
index 726e7869457d2..c70e2a742581b 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-F9P/hwdef.dat
@@ -20,9 +20,6 @@ env AP_PERIPH 1
 
 STM32_ST_USE_TIMER 5
 
-# enable watchdog
-define HAL_WATCHDOG_ENABLED_DEFAULT true
-
 # crystal frequency
 OSCILLATOR_HZ 16000000
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/mRo-M10095/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/mRo-M10095/hwdef.dat
index 5345cd66178be..82c206bfa6067 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/mRo-M10095/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/mRo-M10095/hwdef.dat
@@ -18,9 +18,6 @@ define HAL_STORAGE_SIZE 800
 # setup build for a peripheral firmware
 env AP_PERIPH 1
 
-# enable watchdog
-define HAL_WATCHDOG_ENABLED_DEFAULT true
-
 # crystal frequency
 OSCILLATOR_HZ 8000000