diff --git a/Src/setup.c b/Src/setup.c
index 7a1f288..3e021a1 100644
--- a/Src/setup.c
+++ b/Src/setup.c
@@ -106,6 +106,8 @@ void UART3_Init(void)
 }
 #endif
 
+#if defined(DEBUG_SERIAL_USART2) || defined(CONTROL_SERIAL_USART2) || \
+    defined(DEBUG_SERIAL_USART3) || defined(CONTROL_SERIAL_USART3)
 void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
 {
   GPIO_InitTypeDef GPIO_InitStruct = {0};
@@ -273,6 +275,7 @@ void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
   /* USER CODE END USART3_MspDeInit 1 */
   }
 } 
+#endif
 
 DMA_HandleTypeDef hdma_i2c2_rx;
 DMA_HandleTypeDef hdma_i2c2_tx;