diff --git a/Adafruit_BME280.h b/Adafruit_BME280.h
index fc4f5b5..8e21aea 100644
--- a/Adafruit_BME280.h
+++ b/Adafruit_BME280.h
@@ -34,8 +34,8 @@
     @brief  default I2C address
 */
 /**************************************************************************/
-    #define BME280_ADDRESS                (0x77)
-    #define BME280_ADDRESS_ALTERNATE      (0x76)
+    #define BME280_ADDRESS                (0x77)	// Primary I2C Address
+    #define BME280_ADDRESS_ALTERNATE      (0x76)	// Alternate Address
 /*=========================================================================*/
 
 /**************************************************************************/