diff --git a/htdocs/api/class/api_access.class.php b/htdocs/api/class/api_access.class.php
index 53139b0df8c..52cc9223903 100644
--- a/htdocs/api/class/api_access.class.php
+++ b/htdocs/api/class/api_access.class.php
@@ -64,7 +64,9 @@ class DolibarrApiAccess implements iAuthenticate
 	 * Check access
 	 *
 	 * @return bool
-	 * @throws RestException
+	 *
+	 * @throws RestException 401 Forbidden
+	 * @throws RestException 503 Technical error
 	 */
 	public function __isAllowed()
 	{