diff --git a/src/wp-includes/general-template.php b/src/wp-includes/general-template.php
index 026d190108..087f47ad2a 100644
--- a/src/wp-includes/general-template.php
+++ b/src/wp-includes/general-template.php
@@ -492,7 +492,7 @@ function wp_login_form( $args = array() ) {
 function wp_lostpassword_url( $redirect = '' ) {
 	$args = array( 'action' => 'lostpassword' );
 	if ( !empty($redirect) ) {
-		$args['redirect_to'] = $redirect;
+		$args['redirect_to'] = urlencode( $redirect );
 	}
 
 	$lostpassword_url = add_query_arg( $args, network_site_url('wp-login.php', 'login') );