--- a/CPP/myWindows/StdAfx.h
+++ b/CPP/myWindows/StdAfx.h
@@ -32,7 +32,7 @@
 #include <errno.h>
 #include <math.h>
 
-#ifdef __NETWARE__
+#if defined(__NETWARE__) || defined(__MACH__)
 #include <sys/types.h>
 #endif