diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java
index 6a5e33e..bc7e5eb 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java
@@ -19,11 +19,12 @@
 import com.google.inject.Inject;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.concurrent.ScheduledExecutorService;
 
 class HookQueue implements LifecycleListener {
   private final WorkQueue workQueue;
 
-  private WorkQueue.Executor queue;
+  private ScheduledExecutorService queue;
 
   @Inject
   HookQueue(WorkQueue queue) {
@@ -48,7 +49,6 @@
   @Override
   public void stop() {
     if (queue != null) {
-      queue.unregisterWorkQueue();
       queue.shutdownNow();
       queue = null;
     }