diff --git a/java/com/google/gerrit/entities/Change.java b/java/com/google/gerrit/entities/Change.java
index aab72ea72..1fa099e 100644
--- a/java/com/google/gerrit/entities/Change.java
+++ b/java/com/google/gerrit/entities/Change.java
@@ -103,6 +103,7 @@
     return new AutoValue_Change_Id(id);
   }
 
+  /** The numeric change ID */
   @AutoValue
   public abstract static class Id {
     /**