diff --git a/java/com/google/gerrit/server/mail/send/HttpPasswordUpdateSender.java b/java/com/google/gerrit/server/mail/send/HttpPasswordUpdateSender.java
index 2db2d6d21e..f24ad7aeba 100644
--- a/java/com/google/gerrit/server/mail/send/HttpPasswordUpdateSender.java
+++ b/java/com/google/gerrit/server/mail/send/HttpPasswordUpdateSender.java
@@ -21,6 +21,7 @@ import com.google.gerrit.server.IdentifiedUser;
 import com.google.inject.assistedinject.Assisted;
 import com.google.inject.assistedinject.AssistedInject;
 
+/** Sender that informs a user by email that the HTTP password of their account was updated. */
 public class HttpPasswordUpdateSender extends OutgoingEmail {
   public interface Factory {
     HttpPasswordUpdateSender create(IdentifiedUser user, String operation);