diff --git a/src/wp-includes/class-wp-xmlrpc-server.php b/src/wp-includes/class-wp-xmlrpc-server.php
index ffeb102..844eda0 100644
--- a/src/wp-includes/class-wp-xmlrpc-server.php
+++ b/src/wp-includes/class-wp-xmlrpc-server.php
@@ -5790,7 +5790,7 @@ class wp_xmlrpc_server extends IXR_Server {
 			$recent_posts[] = array(
 				'dateCreated' => $post_date,
 				'userid' => $entry['post_author'],
-				'postid' => (string) $entry['ID'],
+				'postid' => (int) $entry['ID'],
 				'description' => $post['main'],
 				'title' => $entry['post_title'],
 				'link' => $link,