diff --git a/ares/config-win32.h b/ares/config-win32.h
new file mode 100644
index 000000000..f9df53295
--- /dev/null
+++ b/ares/config-win32.h
@@ -0,0 +1,34 @@
+/* $Id$ */
+
+/* Copyright (C) 2004 - 2005 by Daniel Stenberg et al
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  M.I.T. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#ifndef __CONFIG_WIN32_H
+#define __CONFIG_WIN32_H
+
+#if defined(__MINGW32__)
+#define HAVE_GETOPT_H
+#endif
+
+#if defined(__MINGW32__) || defined(__WATCOMC__)
+#define HAVE_UNISTD_H
+#endif
+
+#define HAVE_AF_INET6
+#define HAVE_PF_INET6
+#define HAVE_IOCTLSOCKET
+#define HAVE_STRUCT_IN6_ADDR
+#define HAVE_STRUCT_SOCKADDR_IN6
+#define HAVE_STRUCT_ADDRINFO
+
+#endif  /* __CONFIG_WIN32_H */