diff --git a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
index 3e340bc2c8..b1c5c3ccbc 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
@@ -109,3 +109,5 @@ define AP_MOTORS_FRAME_QUAD_ENABLED 1
 
 # SkyViper isn't going to sprout new compasses:
 define COMPASS_MAX_SENSORS 1
+define BARO_MAX_INSTANCES 1
+define INS_MAX_INSTANCES 1