diff --git a/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef-bl.dat
index 5606d229a7..a0cc056670 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef-bl.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef-bl.dat
@@ -5,7 +5,7 @@
 MCU STM32F4xx STM32F405xx
 
 # board ID for firmware load
-APJ_BOARD_ID 1115
+APJ_BOARD_ID AP_HW_ACNS_CM4PILOT
 
 # crystal frequency
 OSCILLATOR_HZ 16000000
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef.dat
index a3e059f19e..f4467ca877 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/ACNS-CM4Pilot/hwdef.dat
@@ -9,7 +9,7 @@
 MCU STM32F4xx STM32F405xx
 
 # board ID for firmware load
-APJ_BOARD_ID 1115
+APJ_BOARD_ID AP_HW_ACNS_CM4PILOT
 
 # crystal frequency
 OSCILLATOR_HZ 16000000