diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeSolo/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeSolo/hwdef.dat
index baf7aeab4e..a1f9b08279 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubeSolo/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeSolo/hwdef.dat
@@ -5,6 +5,8 @@
 
 include ../fmuv3/hwdef.dat
 
+define HAL_CHIBIOS_ARCH_CUBE 1
+
 env OPTIMIZE -O2
 
 SPIDEV icm20948_ext   SPI4 DEVID1  MPU_EXT_CS   MODE3  4*MHZ  8*MHZ