diff -uNr php-4.3.9.orig/ext/standard/basic_functions.c php-4.3.9/ext/standard/basic_functions.c
--- php-4.3.9.orig/ext/standard/basic_functions.c	2004-07-30 16:52:35.000000000 +0000
+++ php-4.3.9/ext/standard/basic_functions.c	2004-12-14 01:52:01.000000000 +0000
@@ -446,7 +446,7 @@
 	PHP_FE(gethostbyname,													NULL)
 	PHP_FE(gethostbynamel,													NULL)
 
-#if HAVE_RES_SEARCH && !(defined(__BEOS__) || defined(PHP_WIN32) || defined(NETWARE))
+#if HAVE_RES_SEARCH && HAVE_DN_SKIPNAME && !(defined(__BEOS__) || defined(PHP_WIN32) || defined(NETWARE))
 	PHP_FE(checkdnsrr,														NULL)
 	PHP_FE(getmxrr,second_and_third_args_force_ref)
 #endif
diff -uNr php-4.3.9.orig/ext/standard/dns.c php-4.3.9/ext/standard/dns.c
--- php-4.3.9.orig/ext/standard/dns.c	2003-09-01 22:37:46.000000000 +0000
+++ php-4.3.9/ext/standard/dns.c	2004-12-14 01:51:35.000000000 +0000
@@ -207,7 +207,7 @@
 }
 /* }}} */
 
-#if HAVE_RES_SEARCH && !(defined(__BEOS__)||defined(PHP_WIN32) || defined(NETWARE))
+#if HAVE_RES_SEARCH && HAVE_DN_SKIPNAME && !(defined(__BEOS__)||defined(PHP_WIN32) || defined(NETWARE))
 
 /* {{{ proto int checkdnsrr(string host [, string type])
    Check DNS records corresponding to a given Internet host name or IP address */