diff --git a/wp-admin/includes/misc.php b/wp-admin/includes/misc.php
index 2efa458a83..55e24d6059 100644
--- a/wp-admin/includes/misc.php
+++ b/wp-admin/includes/misc.php
@@ -220,8 +220,7 @@ add_action( 'update_option_page_on_front', 'update_home_siteurl', 10, 2 );
  * @return string
  */
 function url_shorten( $url ) {
-	$short_url = str_replace( 'http://', '', wp_unslash( $url ));
-	$short_url = str_replace( 'www.', '', $short_url );
+	$short_url = str_replace( array( 'http://', 'www.' ), '', $short_url );
 	$short_url = untrailingslashit( $short_url );
 	if ( strlen( $short_url ) > 35 )
 		$short_url = substr( $short_url, 0, 32 ) . '...';