diff -ur a/configure.ac b/configure.ac
--- a/configure.ac	2009-10-15 03:42:51.000000000 +0200
+++ b/configure.ac	2015-10-07 02:18:06.571175156 +0200
@@ -82,6 +82,8 @@
 ACF_SEARCH_FUNCTION([res_query], [-lresolv, -lbind],
   [], [AC_MSG_ERROR([res_query not found])],
   [AC_LANG_PROGRAM([[
+      #include <netinet/in.h>
+      #include <arpa/nameser.h>
       #include <resolv.h>
      ]], [[res_query(0, 0, 0, 0, 0);]])
   ])