--- xdrawchem-1.9.9/xdrawchem/application.cpp.compile 2005-11-16 12:01:55.000000000 +0900
+++ xdrawchem-1.9.9/xdrawchem/application.cpp 2012-08-01 15:57:31.545768999 +0900
@@ -14,6 +14,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
+#include <unistd.h>
using std::cout;
using std::endl;