diff --git a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
index b02969b443..eaee46d22c 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
@@ -23,5 +23,6 @@ define LAND_DETECTOR_ACCEL_MAX 2.0f
 undef IOMCU_UART
 
 # support cypress and cc2500 radios
-SPIDEV cypress SPI2 DEVID11 FRAM_CS MODE0  2*MHZ  2*MHZ
-SPIDEV cc2500  SPI2 DEVID12 FRAM_CS MODE0  4*MHZ  4*MHZ
+SPIDEV cypress    SPI2 DEVID11 FRAM_CS     MODE0  2*MHZ  2*MHZ
+SPIDEV cc2500     SPI2 DEVID12 FRAM_CS     MODE0  4*MHZ  4*MHZ
+SPIDEV pixartflow SPI4 DEVID13 MPU_EXT_CS  MODE3  2*MHZ  2*MHZ