Index: wp-load.php
===================================================================
--- wp-load.php	(revision 18373)
+++ wp-load.php	(working copy)
@@ -41,6 +41,9 @@
 	else
 		$path = 'wp-admin/';
 
+	require_once( ABSPATH . '/wp-includes/load.php' );
+	wp_check_php_mysql_versions();
+
 	// Die with an error message
 	require_once( ABSPATH . '/wp-includes/class-wp-error.php' );
 	require_once( ABSPATH . '/wp-includes/functions.php' );
Index: wp-admin/setup-config.php
===================================================================
--- wp-admin/setup-config.php	(revision 18373)
+++ wp-admin/setup-config.php	(working copy)
@@ -40,6 +40,8 @@
 /**#@-*/
 
 require_once(ABSPATH . WPINC . '/load.php');
+wp_check_php_mysql_versions();
+
 require_once(ABSPATH . WPINC . '/compat.php');
 require_once(ABSPATH . WPINC . '/functions.php');
 require_once(ABSPATH . WPINC . '/class-wp-error.php');