diff --git a/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL/hwdef.dat
index 20714712df..275ec38ea7 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL/hwdef.dat
@@ -1,6 +1,8 @@
 # hw definition file for processing by chibios_hwdef.py
 # for H757
 
+AUTOBUILD_TARGETS None
+
 # MCU class and specific type
 MCU STM32H7xx STM32H757xx
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL_intf/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL_intf/hwdef.dat
index 828d25435a..6fe1266038 100755
--- a/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL_intf/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/H757I_EVAL_intf/hwdef.dat
@@ -1,6 +1,8 @@
 # hw definition file for processing by chibios_hwdef.py
 # for H757
 
+AUTOBUILD_TARGETS None
+
 # MCU class and specific type
 MCU STM32H7xx STM32H757xx
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-G491/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-G491/hwdef.dat
index f29ec3ed2b..1063dedd66 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-G491/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-G491/hwdef.dat
@@ -1,5 +1,7 @@
 # hw definition file for processing by chibios_pins.py
 
+AUTOBUILD_TARGETS None
+
 # MCU class and specific type
 MCU STM32G491 STM32G491xx
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L476/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L476/hwdef.dat
index cbd13e18b2..7af93b68cf 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L476/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L476/hwdef.dat
@@ -1,5 +1,7 @@
 # hw definition file for processing by chibios_pins.py
 
+AUTOBUILD_TARGETS None
+
 # MCU class and specific type
 MCU STM32L476 STM32L476xx
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L496/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L496/hwdef.dat
index a1beacc03a..2c30a5dc47 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L496/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Nucleo-L496/hwdef.dat
@@ -1,5 +1,7 @@
 # hw definition file for processing by chibios_pins.py
 
+AUTOBUILD_TARGETS None
+
 # MCU class and specific type
 MCU STM32L496 STM32L496xx
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/NucleoH743/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/NucleoH743/hwdef.dat
index 5e28cecc9b..9b4be799ec 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/NucleoH743/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/NucleoH743/hwdef.dat
@@ -1,6 +1,8 @@
 # hw definition file for processing by chibios_hwdef.py
 # for H743 bootloader
 
+AUTOBUILD_TARGETS None
+
 # MCU class and specific type
 MCU STM32H7xx STM32H743xx