diff --git a/firmware/hw_layer/ports/at32/at32f4/cfg/mcuconf.h b/firmware/hw_layer/ports/at32/at32f4/cfg/mcuconf.h
index 4481d901ee..fe0b024eb2 100644
--- a/firmware/hw_layer/ports/at32/at32f4/cfg/mcuconf.h
+++ b/firmware/hw_layer/ports/at32/at32f4/cfg/mcuconf.h
@@ -323,7 +323,9 @@
 /*
  * SERIAL driver system settings.
  */
+#ifndef STM32_SERIAL_USE_USART1
 #define STM32_SERIAL_USE_USART1             FALSE
+#endif
 #define STM32_SERIAL_USE_USART2             FALSE
 #define STM32_SERIAL_USE_USART3             FALSE
 #define STM32_SERIAL_USE_UART4              FALSE