Index: wp-admin/includes/ajax-actions.php
===================================================================
--- wp-admin/includes/ajax-actions.php	(revision 23582)
+++ wp-admin/includes/ajax-actions.php	(working copy)
@@ -2204,7 +2204,7 @@
 		add_query_arg(
 			array( 'revision' => $revision->ID,
 				'action' => 'restore' ),
-				'/wp-admin/revision.php'
+				admin_url( 'revision.php' )
 		),
 		"restore-post_{$compareto}|{$revision->ID}"
 	);