diff --git a/src/functions.php b/src/functions.php
index ecbc8a349..019c68f0c 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -34,6 +34,7 @@
  *     default_integrations?: bool,
  *     dsn?: string|bool|Dsn|null,
  *     enable_logs?: bool,
+ *     enable_metrics?: bool,
  *     environment?: string|null,
  *     error_types?: int|null,
  *     http_client?: HttpClientInterface|null,