diff --git a/docs/content/observability/access-logs.md b/docs/content/observability/access-logs.md
index f96473a95..1049e6fc5 100644
--- a/docs/content/observability/access-logs.md
+++ b/docs/content/observability/access-logs.md
@@ -47,6 +47,8 @@ accessLog:
 
 ### `format`
 
+_Optional, Default="common"_
+
 By default, logs are written using the Common Log Format (CLF).
 To write logs in JSON, use `json` in the `format` option.
 If the given format is unsupported, the default (CLF) is used instead.