diff --git a/Adafruit_Sensor.h b/Adafruit_Sensor.h
index e90815f..8ac638f 100755
--- a/Adafruit_Sensor.h
+++ b/Adafruit_Sensor.h
@@ -20,7 +20,9 @@
 #ifndef _ADAFRUIT_SENSOR_H
 #define _ADAFRUIT_SENSOR_H
 
-#if ARDUINO >= 100
+#ifndef ARDUINO
+ #include <stdint.h>
+#elif ARDUINO >= 100
  #include "Arduino.h"
  #include "Print.h"
 #else