diff --git a/adem/libraries/I2Cdev/I2Cdev.h b/adem/libraries/I2Cdev/I2Cdev.h
index e30c8c7..62cbfef 100644
--- a/adem/libraries/I2Cdev/I2Cdev.h
+++ b/adem/libraries/I2Cdev/I2Cdev.h
@@ -101,6 +101,13 @@ THE SOFTWARE.
 
 #define MAX_RETRY 4
 
+#ifdef ESP8266
+#define min _min
+#define max _max
+#endif
+
+#define BUFFER_LENGTH 64
+
 class I2Cdev {
     public:
         I2Cdev();