diff --git a/lib/main/STM32F7/Drivers/STM32F7xx_HAL_Driver/Inc/stm32f7xx_hal_def.h b/lib/main/STM32F7/Drivers/STM32F7xx_HAL_Driver/Inc/stm32f7xx_hal_def.h
index 334b42c7d8..ecaafeb7c5 100755
--- a/lib/main/STM32F7/Drivers/STM32F7xx_HAL_Driver/Inc/stm32f7xx_hal_def.h
+++ b/lib/main/STM32F7/Drivers/STM32F7xx_HAL_Driver/Inc/stm32f7xx_hal_def.h
@@ -55,7 +55,9 @@ typedef enum
 
 /* Exported macro ------------------------------------------------------------*/
 
-#define UNUSED(X) (void)X      /* To avoid gcc/g++ warnings */
+#if !defined(UNUSED)
+#define UNUSED(X) ((void)(X))      /* To avoid gcc/g++ warnings */
+#endif
 
 #define HAL_MAX_DELAY      0xFFFFFFFFU