diff --git a/src/wp-includes/ms-functions.php b/src/wp-includes/ms-functions.php
index 0e38638c9a..a1b67a609d 100644
--- a/src/wp-includes/ms-functions.php
+++ b/src/wp-includes/ms-functions.php
@@ -1934,7 +1934,7 @@ function maybe_add_existing_user_to_blog() {
 	if ( empty( $details ) || is_wp_error( add_existing_user_to_blog( $details ) ) )
 		wp_die( sprintf(__('An error occurred adding you to this site. Back to the <a href="%s">homepage</a>.'), home_url() ) );
 
-	wp_die( sprintf( __( 'You have been added to this site. Please visit the <a href="%s">homepage</a> or <a href="%s">log in</a> using your username and password.' ), home_url(), admin_url() ), __( 'WordPress &rsaquo; Success' ) );
+	wp_die( sprintf( __( 'You have been added to this site. Please visit the <a href="%s">homepage</a> or <a href="%s">log in</a> using your username and password.' ), home_url(), admin_url() ), __( 'WordPress &rsaquo; Success' ), array( 'response' => 200 ) );
 }
 
 /**