diff --git a/Sha/sha1_config.h b/Sha/sha1_config.h
index 9797243..a087685 100644
--- a/Sha/sha1_config.h
+++ b/Sha/sha1_config.h
@@ -10,7 +10,7 @@
 	#include <sys/time.h>
 	#include <unistd.h>
 #else
-	#include "arduino.h"
+	#include "Arduino.h"
 #endif
 
 #if  (defined(__linux) || defined(linux)) || defined(__ARDUINO_X86__)
diff --git a/Sha/sha256_config.h b/Sha/sha256_config.h
index 994e123..71c9537 100644
--- a/Sha/sha256_config.h
+++ b/Sha/sha256_config.h
@@ -11,7 +11,7 @@
         #include <sys/time.h>
         #include <unistd.h>
 #else
-        #include "arduino.h"
+        #include "Arduino.h"
 #endif
 
 #if  (defined(__linux) || defined(linux)) || defined(__ARDUINO_X86__)