diff --git a/bspMCU/bsp_uart.c b/bspMCU/bsp_uart.c
index fe4a70a..55ea372 100644
--- a/bspMCU/bsp_uart.c
+++ b/bspMCU/bsp_uart.c
@@ -3,6 +3,12 @@
 extern DMA_HandleTypeDef hdma_usart1_rx;
 extern DMA_HandleTypeDef hdma_usart2_rx;
 extern DMA_HandleTypeDef hdma_usart3_rx;
+#ifdef IOC_100PIN
+extern DMA_HandleTypeDef hdma_uart4_rx;
+extern DMA_HandleTypeDef hdma_uart5_rx;
+extern DMA_HandleTypeDef hdma_usart6_rx;
+extern DMA_HandleTypeDef hdma_uart7_rx;
+#endif
 
 #ifdef CONFIG_UART_IT_IDLEDMA
 static TUartTab g_ptUartTab[] = {
@@ -11,10 +17,10 @@ static TUartTab g_ptUartTab[] = {
     {&huart2, &hdma_usart2_rx},
 	{&huart3, &hdma_usart3_rx},
 #ifdef IOC_100PIN
-	{&huart4, &hdma_usart4_rx},
-	{&huart5, &hdma_usart5_rx},
+	{&huart4, &hdma_uart4_rx},
+	{&huart5, &hdma_uart5_rx},
 	{&huart6, &hdma_usart6_rx},
-	{&huart7, &hdma_usart7_rx}
+	{&huart7, &hdma_uart7_rx}
 #endif
 };
 #else