diff --git a/libraries/AP_HAL_ChibiOS/hwdef/mini-pix/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/mini-pix/hwdef.dat
index e40ee0594a..324ec43322 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/mini-pix/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/mini-pix/hwdef.dat
@@ -28,7 +28,7 @@ STM32_VDD 330U
 I2C_ORDER I2C2 I2C1
 
 # order of UARTs (and USB)
-UART_ORDER OTG1 UART4 USART2 USART3
+UART_ORDER OTG1 UART4 USART3 USART2
 
 # UART4 serial GPS
 PA0 UART4_TX UART4