--- jsr166/src/jsr166e/StampedLock.java	2013/01/09 02:51:37	1.26
+++ jsr166/src/jsr166e/StampedLock.java	2013/01/14 19:00:01	1.27
@@ -252,6 +252,8 @@ public class StampedLock implements java
      * be subject to future improvements.
      */
 
+    private static final long serialVersionUID = -6001602636862214147L;
+
     /** Number of processors, for spin control */
     private static final int NCPU = Runtime.getRuntime().availableProcessors();