diff --git a/newton-4.00/sdk/dCore/ndTypes.h b/newton-4.00/sdk/dCore/ndTypes.h
index cfb9a46935..8cced09ca7 100644
--- a/newton-4.00/sdk/dCore/ndTypes.h
+++ b/newton-4.00/sdk/dCore/ndTypes.h
@@ -28,6 +28,8 @@
 	#endif
 #endif
 
+#define ND_NEWTON_VERSION	401
+
 #if (defined (WIN32) || defined(_WIN32) || defined (_M_ARM) || defined (_M_ARM64))
 	#include <io.h>
 	#include <stdint.h>