diff --git a/core/my_basic.h b/core/my_basic.h
index 76b6d32..1df20b9 100755
--- a/core/my_basic.h
+++ b/core/my_basic.h
@@ -30,9 +30,7 @@
 extern "C" {
 #endif /* __cplusplus */
 
-#if defined ARDUINO
-#	define MB_CP_ARDUINO
-#elif defined __BORLANDC__
+#if defined __BORLANDC__
 #	define MB_CP_BORLANDC
 #elif defined __clang__
 #	define MB_CP_CLANG