diff --git a/src/wp-includes/IXR/class-IXR-client.php b/src/wp-includes/IXR/class-IXR-client.php
index 480822316b..2072f7c9c2 100644
--- a/src/wp-includes/IXR/class-IXR-client.php
+++ b/src/wp-includes/IXR/class-IXR-client.php
@@ -62,6 +62,8 @@ class IXR_Client
 	 * @since 1.5.0
 	 * @since 5.5.0 Formalized the existing `...$args` parameter by adding it
 	 *              to the function signature.
+	 *
+	 * @return bool
 	 */
     function query( ...$args )
     {
diff --git a/src/wp-includes/IXR/class-IXR-clientmulticall.php b/src/wp-includes/IXR/class-IXR-clientmulticall.php
index 5a10246dbd..d7aa67b2d5 100644
--- a/src/wp-includes/IXR/class-IXR-clientmulticall.php
+++ b/src/wp-includes/IXR/class-IXR-clientmulticall.php
@@ -44,6 +44,8 @@ class IXR_ClientMulticall extends IXR_Client
 	 * @since 1.5.0
 	 * @since 5.5.0 Formalized the existing `...$args` parameter by adding it
 	 *              to the function signature.
+	 *
+	 * @return bool
 	 */
     function query( ...$args )
     {
diff --git a/src/wp-includes/class-wp-http-ixr-client.php b/src/wp-includes/class-wp-http-ixr-client.php
index f873e8f728..401bd97589 100644
--- a/src/wp-includes/class-wp-http-ixr-client.php
+++ b/src/wp-includes/class-wp-http-ixr-client.php
@@ -46,10 +46,13 @@ class WP_HTTP_IXR_Client extends IXR_Client {
 	}
 
 	/**
+	 * @since 3.1.0
+	 * @since 5.5.0 Formalized the existing `...$args` parameter by adding it
+	 *              to the function signature.
+	 *
 	 * @return bool
 	 */
-	public function query() {
-		$args    = func_get_args();
+	public function query( ...$args ) {
 		$method  = array_shift( $args );
 		$request = new IXR_Request( $method, $args );
 		$xml     = $request->getXml();