diff --git a/bsp/stm32/stm32f091-st-nucleo/board/Kconfig b/bsp/stm32/stm32f091-st-nucleo/board/Kconfig
index 745a331f3138f2e85939df81bcc10c68ee47d528..4fe2365ebcf6820a2b77b978298f951ae85fc5fd 100644
--- a/bsp/stm32/stm32f091-st-nucleo/board/Kconfig
+++ b/bsp/stm32/stm32f091-st-nucleo/board/Kconfig
@@ -9,7 +9,7 @@ menu "Onboard Peripheral Drivers"
 
     config BSP_USING_USB_TO_USART
         bool "Enable USB TO USART (uart2)"
-	select BSP_USING_UART
+        select BSP_USING_UART
         select BSP_USING_UART2
         default y
 
diff --git a/bsp/stm32/stm32l475-atk-pandora/board/Kconfig b/bsp/stm32/stm32l475-atk-pandora/board/Kconfig
index 0ec5631f1aea4944dd50e697a3f7f35df4ab7b16..afe8fe2f5ebb934d484045394c1406dd0390a45c 100644
--- a/bsp/stm32/stm32l475-atk-pandora/board/Kconfig
+++ b/bsp/stm32/stm32l475-atk-pandora/board/Kconfig
@@ -51,7 +51,7 @@ menu "On-chip Peripheral Drivers"
                 bool "Enable UART1 RX DMA"
                 depends on BSP_USING_UART1 && RT_SERIAL_USING_DMA
                 default n
-                
+
             config BSP_USING_UART2
                 bool "Enable UART2"
                 default n