diff --git a/libraries/AP_HAL_ChibiOS/hwdef/VRBrain-v52/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/VRBrain-v52/hwdef.dat
index 55cfd78c35..f221c8dcb1 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/VRBrain-v52/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/VRBrain-v52/hwdef.dat
@@ -165,3 +165,6 @@ define HAL_BATT_VOLT_SCALE 10.1
 define HAL_BATT_CURR_SCALE 17.0
 
 define STM32_PWM_USE_ADVANCED TRUE
+
+# minimal drivers to reduce flash usage
+include ../include/minimal.inc
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/VRCore-v10/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/VRCore-v10/hwdef.dat
index 9e505f3f77..9ec4301d09 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/VRCore-v10/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/VRCore-v10/hwdef.dat
@@ -165,3 +165,6 @@ define HAL_BATT_VOLT_SCALE 10.1
 define HAL_BATT_CURR_SCALE 17.0
 
 define STM32_PWM_USE_ADVANCED TRUE
+
+# minimal drivers to reduce flash usage
+include ../include/minimal.inc