diff --git a/content/doc/book/managing/system-properties.adoc b/content/doc/book/managing/system-properties.adoc
index c9a106220cdc..3ab527db0677 100644
--- a/content/doc/book/managing/system-properties.adoc
+++ b/content/doc/book/managing/system-properties.adoc
@@ -64,13 +64,17 @@ properties:
 
 - name: hudson.ClassicPluginStrategy.useAntClassLoader
   tags:
-  - obsolete
+  - escape hatch
   def: |
-    `false`
+    `false` (until 2.309 and since 2.348), `true` (from 2.310 to 2.347)
   since: 1.316
   # Unused since https://github.com/jenkinsci/jenkins/commit/47de54d070f67af95b4fefb6d006a72bb31a5cb8
+  # Restored and default in https://github.com/jenkinsci/jenkins/pull/5698
+  # Disabled since https://github.com/jenkinsci/jenkins/pull/6571
   description: |
-    Unused since 1.527.
+    Unused between 1.527 and 2.309.
+    Since 2.310, can be set to `false` to use `URLClassLoader` instead.
+    This is the default since 2.347.
 
 - name: hudson.cli.CLI.pingInterval
   tags: