diff --git a/wp-activate.php b/wp-activate.php
index 135720441..a315bbb89 100644
--- a/wp-activate.php
+++ b/wp-activate.php
@@ -5,6 +5,12 @@ define( "WP_INSTALLING", true );
 require( dirname(__FILE__) . '/wp-load.php' );
 
 require( 'wp-blog-header.php' );
+
+if ( !is_multisite() ) {
+	wp_redirect( get_option( 'siteurl' ) . "/wp-login.php?action=register" );
+	die();
+}
+
 require_once( ABSPATH . WPINC . '/registration.php');
 
 if ( is_object( $wp_object_cache ) )