diff --git a/include/sta/devices/stm32/mcu/STM32F407xx.hpp b/include/sta/devices/stm32/mcu/STM32F407xx.hpp
index bc424f9..489efa7 100644
--- a/include/sta/devices/stm32/mcu/STM32F407xx.hpp
+++ b/include/sta/devices/stm32/mcu/STM32F407xx.hpp
@@ -8,11 +8,11 @@
 #include <sta/devices/stm32/mcu/common.hpp>
 
 // uart setup
-#ifdef STA_STM32_USART_ASEAG
+#ifdef STA_STM32_ASEAG
 #    define STA_STM32_USART_HANDLE huart1
 #else
-#    ifdef defined(STA_STM32_SWD_USART_IDX)
-#        define STA_STM32_USART_HANDLE huart CONCAT(huart, STA_STM32_SWD_USART_IDX)
+#    ifdef STA_STM32_SWD_USART_IDX
+#        define STA_STM32_USART_HANDLE CONCAT(huart, STA_STM32_SWD_USART_IDX)
 #    endif // STA_STM32_SWD_USART_IDX
 #endif // STA_STM32_SWD_USART_IDX