diff --git a/changelog.html b/changelog.html
index 79d8bc222fa929b8f7866376bdf876c1a44185e3..92476b15d11cedb4cc5a27a5f76d97ce09f6d6dd 100644
--- a/changelog.html
+++ b/changelog.html
@@ -66,6 +66,9 @@ Upcoming changes</a>
   <li class=bug>
     <code>/login</code> offers link to <code>/opensearch.xml</code> which anonymous users cannot retrieve.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-21254">issue 21254</a>)
+  <li class=rfe>
+    Added API class <code>SecurityListener</code> to receive login events and similar.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-20999">issue 20999</a>)
 </ul>
 </div><!--=TRUNK-END=-->
 
diff --git a/core/src/main/java/jenkins/security/SecurityListener.java b/core/src/main/java/jenkins/security/SecurityListener.java
index 316243ef5252f36e11c12706b7716a8754011ba0..d106a20aa8a356c0a2f99467eeed8034989863c5 100644
--- a/core/src/main/java/jenkins/security/SecurityListener.java
+++ b/core/src/main/java/jenkins/security/SecurityListener.java
@@ -40,7 +40,7 @@ import org.kohsuke.accmod.restrictions.NoExternalUse;
 
 /**
  * Listener notified of various significant events related to security.
- * @since TODO
+ * @since 1.548
  */
 public abstract class SecurityListener implements ExtensionPoint {