diff --git a/kulifuli-arduino.ino b/kulifuli-arduino.ino
index 8fd4563..7c86fa1 100644
--- a/kulifuli-arduino.ino
+++ b/kulifuli-arduino.ino
@@ -1,3 +1,6 @@
+#include "Arduino.h"
+
+
 void setup () {
   Serial . begin (9600) ;