diff --git a/libraries/src/MVC/Controller/ApiController.php b/libraries/src/MVC/Controller/ApiController.php
index 5311891a1986d..a53961f32ed21 100644
--- a/libraries/src/MVC/Controller/ApiController.php
+++ b/libraries/src/MVC/Controller/ApiController.php
@@ -401,9 +401,14 @@ public function edit()
 	/**
 	 * Method to save a record.
 	 *
-	 * @param   integer  $recordKey  The primary key of the item (if exists)
+	 * @param   integer|null  $recordKey  The primary key of the item (if exists)
 	 *
-	 * @return  integer  The record ID on success, false on failure
+	 * @return  integer|boolean  The record ID on success, false on failure
+	 *
+	 * @throws InvalidParameterException
+	 * @throws \RuntimeException
+	 * @throws \Exception
+	 * @throws \Joomla\CMS\MVC\Controller\Exception\CheckinCheckout
 	 *
 	 * @since   4.0.0
 	 */