diff --git a/wp-admin/includes/schema.php b/wp-admin/includes/schema.php
index e6910a1e71..48507510fa 100644
--- a/wp-admin/includes/schema.php
+++ b/wp-admin/includes/schema.php
@@ -700,7 +700,7 @@ Thanks!
 		'welcome_email' => $welcome_email,
 		'first_post' => __( 'Welcome to <a href="SITE_URL">SITE_NAME</a>. This is your first post. Edit or delete it, then start blogging!' ),
 		// @todo - network admins should have a method of editing the network siteurl (used for cookie hash)
-		'siteurl' => get_option( 'siteurl' ),
+		'siteurl' => get_option( 'siteurl' ) . '/',
 		'add_new_users' => '0',
 		'upload_space_check_disabled' => '0',
 		'subdomain_install' => intval( $subdomain_install ),