diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CUAVv5Nano/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CUAVv5Nano/hwdef.dat
index 7be9058ba4..9416736b58 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CUAVv5Nano/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CUAVv5Nano/hwdef.dat
@@ -12,8 +12,8 @@ STM32_ST_USE_TIMER 5
 undef PE3
 PE3 VDD_3V3_SENSORS_EN OUTPUT LOW
 
-# order of UARTs (and USB). Telem2 is UART4 on the mini, USART3 is not available
-UART_ORDER OTG1 USART1 USART2 UART4 USART6 UART7
+# order of UARTs (and USB).
+UART_ORDER OTG1 USART1 USART2 USART3 UART4 USART6 UART7
 
 # enable TX on USART6 (disabled for fmuv5 with iomcu)
 PG14 USART6_TX USART6 NODMA