#include <X11/keysym.h>
#include <X11/Xutil.h>
-#if defined(LINUX)
+#if defined(__linux)
#include <pty.h>
-#elif defined(OPENBSD) || defined(NETBSD)
+#elif defined(__OpenBSD__) || defined(__NetBSD__)
#include <util.h>
-#elif defined(FREEBSD)
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
#include <libutil.h>
#endif