diff --git a/hal/targets/hal/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F031K6/PeripheralPins.c b/hal/targets/hal/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F031K6/PeripheralPins.c
index 5055b99a1e..af02c2fcb8 100644
--- a/hal/targets/hal/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F031K6/PeripheralPins.c
+++ b/hal/targets/hal/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F031K6/PeripheralPins.c
@@ -109,6 +109,7 @@ const PinMap PinMap_UART_TX[] = {
 };
 
 const PinMap PinMap_UART_RX[] = {
+    {PA_3, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART1)},
     {PA_10, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART1)},
     {PA_15, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART1)}, // STDIO RX
     {PB_7,  UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART1)},