diff --git a/core/src/main/java/hudson/slaves/OfflineCause.java b/core/src/main/java/hudson/slaves/OfflineCause.java
index 59775b935d8e3647c4f8a48d585739980d8d5128..d4bbc763da945e647725b5fdcb4bfa645920440e 100644
--- a/core/src/main/java/hudson/slaves/OfflineCause.java
+++ b/core/src/main/java/hudson/slaves/OfflineCause.java
@@ -102,7 +102,7 @@ public abstract class OfflineCause {
 
     /**
      * Taken offline by user.
-     * @since TODO
+     * @since 1.551
      */
     public static class UserCause extends SimpleOfflineCause {
         private final User user;