diff --git a/src/mwc_stepper.h b/src/mwc_stepper.h
index 10252ab..2be9d90 100644
--- a/src/mwc_stepper.h
+++ b/src/mwc_stepper.h
@@ -4,7 +4,7 @@
 #define _MWC_STEPPER_h
 
 #if defined(ARDUINO) && ARDUINO >= 100
-	#include "arduino.h"
+	#include "Arduino.h"
 #else
 	#include "WProgram.h"
 #endif