diff --git a/src/app/Dictionary.h b/src/app/Dictionary.h
index 06d87c1..63566ef 100644
--- a/src/app/Dictionary.h
+++ b/src/app/Dictionary.h
@@ -4,7 +4,12 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
-#include <Arduino.h>
+
+#ifdef ARDUINO
+  #include <Arduino.h>
+#else
+  typedef bool boolean;
+#endif //ARDUINO
 
 template <typename T>
 class Dictionary;