diff --git a/wp-admin/includes/update.php b/wp-admin/includes/update.php
index ff787167ea..e02d4de2e7 100644
--- a/wp-admin/includes/update.php
+++ b/wp-admin/includes/update.php
@@ -264,7 +264,7 @@ function wp_theme_update_row( $theme_key, $theme ) {
 	$themes_allowedtags = array('a' => array('href' => array(),'title' => array()),'abbr' => array('title' => array()),'acronym' => array('title' => array()),'code' => array(),'em' => array(),'strong' => array());
 	$theme_name = wp_kses( $theme['Name'], $themes_allowedtags );
 
-	$details_url = self_admin_url("theme-install.php?tab=theme-information&theme=$theme_key&TB_iframe=true&width=600&height=400");
+	$details_url = add_query_arg( array( 'TB_iframe' => 'true', 'width' => 1024, 'height' => 800 ), $current->response[ $theme_key ]['url'] );
 
 	$wp_list_table = _get_list_table('WP_MS_Themes_List_Table');