diff --git a/Tools/scripts/build_options.py b/Tools/scripts/build_options.py
index 36d58d7272864..a5a112a220d8f 100644
--- a/Tools/scripts/build_options.py
+++ b/Tools/scripts/build_options.py
@@ -292,6 +292,7 @@ def __init__(self,
     Feature('Baro', 'ICP101XX', 'AP_BARO_ICP101XX_ENABLED', 'Enable ICP101XX Barometric Sensor', 0, None),
     Feature('Baro', 'ICP201XX', 'AP_BARO_ICP201XX_ENABLED', 'Enable ICP201XX Barometric Sensor', 0, None),
     Feature('Baro', 'BARO_TEMPCAL', 'AP_TEMPCALIBRATION_ENABLED', 'Enable Baro Temperature Calibration', 0, None),
+    Feature('Baro', 'BARO_PROBEXT', 'AP_BARO_PROBE_EXTERNAL_I2C_BUSES', 'Enable Probing of External i2c buses', 0, None),
 
     Feature('Sensors', 'RPM', 'AP_RPM_ENABLED', 'Enable RPM sensors', 0, None),
     Feature('Sensors', 'RPM_EFI', 'AP_RPM_EFI_ENABLED', 'Enable RPM EFI sensors', 0, 'RPM,EFI'),
diff --git a/Tools/scripts/extract_features.py b/Tools/scripts/extract_features.py
index ed5eaf3f71144..63a83863f05ec 100755
--- a/Tools/scripts/extract_features.py
+++ b/Tools/scripts/extract_features.py
@@ -255,6 +255,7 @@ def __init__(self, filename, nm="arm-none-eabi-nm", strings="strings"):
             ('AP_OSD_LINK_STATS_EXTENSIONS_ENABLED', r'AP_OSD_Screen::draw_rc_tx_power'),
             ('HAL_ENABLE_DRONECAN_DRIVERS', r'AP_DroneCAN::init'),
             ('AP_MAVLINK_MSG_HIL_GPS_ENABLED', r'mavlink_msg_hil_gps_decode'),
+            ('AP_BARO_PROBE_EXTERNAL_I2C_BUSES', r'AP_Compass::_probe_external_i2c_compasses'),
         ]
 
     def progress(self, msg):