diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index ebb45eed12..9b737cb362 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -100,9 +100,9 @@ function wp_default_scripts( &$scripts ) {
 			'deleted' => __('Deleted'),
 	) );
 
-	$scripts->add( 'jquery-ui-core', '/wp-includes/js/jquery/ui.core.js', array('jquery'), '1.5' );
-	$scripts->add( 'jquery-ui-tabs', '/wp-includes/js/jquery/ui.tabs.js', array('jquery-ui-core'), '1.5' );
-	$scripts->add( 'jquery-ui-sortable', '/wp-includes/js/jquery/ui.sortable.js', array('jquery-ui-core'), '1.5' );
+	$scripts->add( 'jquery-ui-core', '/wp-includes/js/jquery/ui.core.js', array('jquery'), '1.5.1' );
+	$scripts->add( 'jquery-ui-tabs', '/wp-includes/js/jquery/ui.tabs.js', array('jquery-ui-core'), '1.5.1' );
+	$scripts->add( 'jquery-ui-sortable', '/wp-includes/js/jquery/ui.sortable.js', array('jquery-ui-core'), '1.5.1' );
 
 	if ( is_admin() ) {
 		$scripts->add( 'ajaxcat', '/wp-admin/js/cat.js', array( 'wp-lists' ), '20071101' );