diff --git a/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java b/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java
index 67e68f1fd..4fc43fcce 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java
@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2018-2020 Florian Schmaus
+ * Copyright 2018-2023 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -276,8 +276,7 @@ public class SmackReactor {
                     setInterestOpsCancelledKeySafe(selectionKey, 0);
                 }
 
-                selectedKeys = new ArrayList<>(selectedKeySet.size());
-                selectedKeys.addAll(selectedKeySet);
+                selectedKeys = new ArrayList<>(selectedKeySet);
                 selectedKeySet.clear();
             }