diff --git a/libraries/AP_HAL_ChibiOS/hwdef/RADIX2HD/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/RADIX2HD/hwdef.dat
index 356570353543c..3490c49019837 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/RADIX2HD/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/RADIX2HD/hwdef.dat
@@ -165,6 +165,7 @@ BARO DPS310 I2C:0:0x76
 
 # probe external compasses (same bus as internal)
 define HAL_PROBE_EXTERNAL_I2C_COMPASSES
+define HAL_I2C_INTERNAL_MASK 0
 
 # filesystem setup on sdcard
 define HAL_OS_FATFS_IO 1