diff --git a/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat
index 895e3703bc86b..c2d5beca9a014 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat
@@ -95,6 +95,10 @@ COMPASS IST8310 I2C:0:0x0E false ROTATION_NONE
 # compass  RM3100 on can-F9P-v2
 COMPASS RM3100 I2C:0:0x20 false ROTATION_NONE
 
+# baro, disabled by default
+BARO ICP201XX I2C:0:0x64
+define AP_PERIPH_BARO_ENABLE_DEFAULT 0
+
 define HAL_USE_ADC FALSE
 define STM32_ADC_USE_ADC1 FALSE
 define HAL_DISABLE_ADC_DRIVER TRUE
@@ -133,6 +137,7 @@ define GPS_MOVING_BASELINE 1
 # GPS+MAG+LEDs
 define HAL_PERIPH_ENABLE_GPS
 define HAL_PERIPH_ENABLE_MAG
+define HAL_PERIPH_ENABLE_BARO
 define HAL_PERIPH_ENABLE_NOTIFY
 define HAL_PERIPH_ENABLE_RC_OUT