diff --git a/bspMCU/bsp_uart.c b/bspMCU/bsp_uart.c
index 3312963..fe4a70a 100644
--- a/bspMCU/bsp_uart.c
+++ b/bspMCU/bsp_uart.c
@@ -2,14 +2,15 @@
 #ifdef USE_UART
 extern DMA_HandleTypeDef hdma_usart1_rx;
 extern DMA_HandleTypeDef hdma_usart2_rx;
+extern DMA_HandleTypeDef hdma_usart3_rx;
 
 #ifdef CONFIG_UART_IT_IDLEDMA
 static TUartTab g_ptUartTab[] = {
     {&hlpuart1, &hdma_usart2_rx},
     {&huart1, &hdma_usart1_rx},
     {&huart2, &hdma_usart2_rx},
-#ifdef IOC_100PIN
 	{&huart3, &hdma_usart3_rx},
+#ifdef IOC_100PIN
 	{&huart4, &hdma_usart4_rx},
 	{&huart5, &hdma_usart5_rx},
 	{&huart6, &hdma_usart6_rx},