--- /dev/null
+#ifndef __ARES_BITNCMP_H
+#define __ARES_BITNCMP_H
+
+
+/* Copyright (C) 2005, 2013 by Dominick Meglio
+ *
+ * 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 HAVE_BITNCMP
+int ares__bitncmp(const void *l, const void *r, int n);
+#else
+#define ares__bitncmp(x,y,z) bitncmp(x,y,z)
+#endif
+
+#endif /* __ARES_BITNCMP_H */