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

@@ -577,7 +577,8 @@
     public static long toUnsignedLong(short x) {
         return ((long) x) & 0xffffL;
     }
 
     /** use serialVersionUID from JDK 1.1. for interoperability */
+    @java.io.Serial
     private static final long serialVersionUID = 7515723908773894738L;
 }