diff --git a/Adafruit_I2CDevice.cpp b/Adafruit_I2CDevice.cpp
index eea3187..83e48bf 100644
--- a/Adafruit_I2CDevice.cpp
+++ b/Adafruit_I2CDevice.cpp
@@ -1,7 +1,7 @@
 #include <Adafruit_I2CDevice.h>
 #include <Arduino.h>
 
-//#define DEBUG_SERIAL Serial
+#define DEBUG_SERIAL Serial
 
 /*!
  *    @brief  Create an I2C device at a given address