diff --git a/java/google/registry/flows/domain/DomainDeleteFlow.java b/java/google/registry/flows/domain/DomainDeleteFlow.java
index 18a558f38..4e96f5159 100644
--- a/java/google/registry/flows/domain/DomainDeleteFlow.java
+++ b/java/google/registry/flows/domain/DomainDeleteFlow.java
@@ -82,7 +82,7 @@ import org.joda.time.DateTime;
  * @error {@link DomainDeleteFlow.DomainToDeleteHasHostsException}
  * @error {@link DomainFlowUtils.NotAuthorizedForTldException}
  */
-public class DomainDeleteFlow extends LoggedInFlow implements TransactionalFlow {
+public final class DomainDeleteFlow extends LoggedInFlow implements TransactionalFlow {
 
   private static final ImmutableSet<StatusValue> DISALLOWED_STATUSES = ImmutableSet.of(
       StatusValue.LINKED,