diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat
index 3936917cf3..985f9e8bab 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat
@@ -307,6 +307,7 @@ define HAL_BATT_CURR_PIN 15
 define HAL_BATT_VOLT_SCALE 10.1
 define HAL_BATT_CURR_SCALE 17.0
 define HAL_GPIO_PWM_VOLT_PIN 3
+define HAL_GPIO_PWM_VOLT_3v3 1
 
 # List of files to put in ROMFS. For fmuv3 we need an IO firmware so
 # we can automatically update the IOMCU firmware on boot. The format
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/hwdef.dat
index fecf294899..6daf99bc69 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/hwdef.dat
@@ -454,6 +454,7 @@ define HAL_BATT_CURR_PIN 3
 define HAL_BATT_VOLT_SCALE 10.1
 define HAL_BATT_CURR_SCALE 17.0
 define HAL_GPIO_PWM_VOLT_PIN 3
+define HAL_GPIO_PWM_VOLT_3v3 1
 
 # this defines the default maximum clock on I2C devices.
 define HAL_I2C_MAX_CLOCK 100000
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/mRoPixracerPro/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/mRoPixracerPro/hwdef.dat
index 1688b40a43..6bfe7f37b9 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/mRoPixracerPro/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/mRoPixracerPro/hwdef.dat
@@ -211,6 +211,8 @@ PI3 VDD_1V8_SENSORS_EN OUTPUT HIGH
 
 # Pin for PWM Voltage Selection, 0 means 3.3v, 1 means 5v
 PG6 PWM_VOLT_SEL OUTPUT LOW GPIO(74)
+define HAL_GPIO_PWM_VOLT_PIN 74
+define HAL_GPIO_PWM_VOLT_3v3 0
 
 # Power flag pins: these tell the MCU the status of the various power
 # supplies that are available. The pin names need to exactly match the