diff --git a/doc/api/perf_hooks.md b/doc/api/perf_hooks.md
index 80a3c46f36a281..750c2bbc692097 100644
--- a/doc/api/perf_hooks.md
+++ b/doc/api/perf_hooks.md
@@ -585,6 +585,10 @@ Disconnects the `PerformanceObserver` instance from all notifications.
 <!-- YAML
 added: v8.5.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/39297
+    description: Updated to conform to Performance Timeline Level 2. The
+                 buffered option has been added back.
   - version: v16.0.0
     pr-url: https://github.com/nodejs/node/pull/37136
     description: Updated to conform to User Timing Level 3. The
@@ -597,6 +601,10 @@ changes:
   * `entryTypes` {string[]} An array of strings identifying the types of
     {PerformanceEntry} instances the observer is interested in. If not
     provided an error will be thrown.
+  * `buffered` {boolean} If true, the observer callback is called with a
+    list global `PerformanceEntry` buffered entries. If false, only
+    `PerformanceEntry`s created after the time point are sent to the
+    observer callback. **Default:** `false`.
 
 Subscribes the {PerformanceObserver} instance to notifications of new
 {PerformanceEntry} instances identified either by `options.entryTypes`