diff --git a/wp-admin/upgrade.php b/wp-admin/upgrade.php
index d4e450276..a5e86d707 100644
--- a/wp-admin/upgrade.php
+++ b/wp-admin/upgrade.php
@@ -20,6 +20,8 @@ require( '../wp-load.php' );
 timer_start();
 require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
 
+delete_transient('update_core');
+
 if ( isset( $_GET['step'] ) )
 	$step = $_GET['step'];
 else