src/java.base/share/classes/java/lang/Long.java

@@ -1998,7 +1998,8 @@
     public Long resolveConstantDesc(MethodHandles.Lookup lookup) {
         return this;
     }
 
     /** use serialVersionUID from JDK 1.0.2 for interoperability */
+    @java.io.Serial
     @Native private static final long serialVersionUID = 4290774380558885855L;
 }