diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-TrueNavPro-G4/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-TrueNavPro-G4/hwdef.dat
index 3015e7714c..5162c63078 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/Sierra-TrueNavPro-G4/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/Sierra-TrueNavPro-G4/hwdef.dat
@@ -104,7 +104,7 @@ env ROMFS_UNCOMPRESSED True
 # PWM, WS2812 LED
 PA3 TIM2_CH4 TIM2 PWM(1)
 
-DMA_NOSHARE USART2*
+DMA_NOSHARE USART2* SPI1*
 
 define CAN_APP_NODE_NAME "in.sierraaerospace.TrueNavPro-G4"