src/java.base/share/classes/java/util/LinkedHashMap.java

@@ -194,10 +194,11 @@
         Entry(int hash, K key, V value, Node<K,V> next) {
             super(hash, key, value, next);
         }
     }
 
+    @java.io.Serial
     private static final long serialVersionUID = 3801124242820219131L;
 
     /**
      * The head (eldest) of the doubly linked list.
      */