--- old/src/java.base/share/classes/java/util/Stack.java	2019-08-27 17:29:12.810324386 -0700
+++ new/src/java.base/share/classes/java/util/Stack.java	2019-08-27 17:29:12.646324386 -0700
@@ -137,5 +137,6 @@
     }
 
     /** use serialVersionUID from JDK 1.0.2 for interoperability */
+    @java.io.Serial
     private static final long serialVersionUID = 1224463164541339165L;
 }