diff --git a/Adafruit_BME280.h b/Adafruit_BME280.h
index 8e21aea..f5dbe91 100644
--- a/Adafruit_BME280.h
+++ b/Adafruit_BME280.h
@@ -35,6 +35,11 @@
 */
 /**************************************************************************/
     #define BME280_ADDRESS                (0x77)	// Primary I2C Address
+/**************************************************************************/
+/*! 
+    @brief  alternate I2C address
+*/
+/**************************************************************************/
     #define BME280_ADDRESS_ALTERNATE      (0x76)	// Alternate Address
 /*=========================================================================*/