diff --git a/cf/resolv.m4 b/cf/resolv.m4
index b4045094d..49c868ab0 100644
--- a/cf/resolv.m4
+++ b/cf/resolv.m4
@@ -5,7 +5,7 @@ dnl
 
 AC_DEFUN([rk_RESOLV],[
 
-AC_CHECK_HEADERS([arpa/nameser.h])
+AC_CHECK_HEADERS([arpa/nameser.h dns.h])
 
 AC_CHECK_HEADERS(resolv.h, , , [AC_INCLUDES_DEFAULT
 #ifdef HAVE_SYS_TYPES_H
@@ -73,6 +73,15 @@ AC_FIND_FUNC(res_ndestroy, resolv,
 ],
 [0])
 
+AC_FIND_FUNC_NO_LIBS(dns_search,,
+[
+#ifdef HAVE_DNS_H
+#include <dns.h>
+#endif
+],
+[0,0,0,0,0,0,0,0])
+
+
 AC_FIND_FUNC(dn_expand, resolv,
 [
 #include <stdio.h>