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

@@ -88,7 +88,8 @@
      */
     public UnsupportedOperationException(Throwable cause) {
         super(cause);
     }
 
+    @java.io.Serial
     static final long serialVersionUID = -1242599979055084673L;
 }