diff --git a/.gitignore b/.gitignore
index 07d8a24..24493c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 .ino*
 Release/
 Prototype/
+.*/
diff --git a/libraries/TinyPower/TinyPower.h b/libraries/TinyPower/TinyPower.h
index 9fb9953..134947a 100644
--- a/libraries/TinyPower/TinyPower.h
+++ b/libraries/TinyPower/TinyPower.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Arduino.h"
 #include <avr/sleep.h>
 #include <avr/power.h>
 #include <avr/wdt.h>