diff --git a/libraries/AP_HAL_ChibiOS/AnalogIn.cpp b/libraries/AP_HAL_ChibiOS/AnalogIn.cpp
index c62f91c874..b991b2b7e9 100644
--- a/libraries/AP_HAL_ChibiOS/AnalogIn.cpp
+++ b/libraries/AP_HAL_ChibiOS/AnalogIn.cpp
@@ -29,11 +29,6 @@ extern AP_IOMCU iomcu;
 
 #include "hwdef/common/stm32_util.h"
 
-#ifndef CHIBIOS_ADC_MAVLINK_DEBUG
-// this allows the first 6 analog channels to be reported by mavlink for debugging purposes
-#define CHIBIOS_ADC_MAVLINK_DEBUG 0
-#endif
-
 // MAVLink is included as we send a mavlink message as part of debug,
 // and also use the MAV_POWER flags below in update_power_flags
 #include <GCS_MAVLink/GCS_MAVLink.h>
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-f412-rev1/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-f412-rev1/hwdef.dat
index b4050dd62b..b333d85f09 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-f412-rev1/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-f412-rev1/hwdef.dat
@@ -126,8 +126,6 @@ define ARMING_DELAY_SEC 0
 define LAND_START_ALT 700
 define LAND_DETECTOR_ACCEL_MAX 2.0f
 
-define CHIBIOS_ADC_MAVLINK_DEBUG 1
-
 COMPASS BMM150 I2C:0:0x10 false ROTATION_NONE
 
 define HAL_BARO_DEFAULT HAL_BARO_20789_I2C_SPI
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-journey/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-journey/hwdef.dat
index 05eff41dbd..f65056e970 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-journey/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-journey/hwdef.dat
@@ -117,8 +117,6 @@ define LAND_START_ALT 700
 define LAND_DETECTOR_ACCEL_MAX 2.0f
 define ALLOW_ARM_NO_COMPASS
 
-define CHIBIOS_ADC_MAVLINK_DEBUG 1
-
 COMPASS BMM150 I2C:0:0x10 false ROTATION_NONE
 
 define HAL_BARO_DEFAULT HAL_BARO_20789_I2C_I2C