diff -r bceea7bc12b7 -r d01972926813 jdk/src/share/classes/sun/management/counter/perf/PerfLongCounter.java
--- a/jdk/src/share/classes/sun/management/counter/perf/PerfLongCounter.java	Tue Oct 27 16:32:23 2009 -0700
+++ b/jdk/src/share/classes/sun/management/counter/perf/PerfLongCounter.java	Wed Oct 28 11:18:01 2009 -0700
@@ -62,4 +62,6 @@
                                        getFlags(),
                                        longValue());
     }
+
+    private static final long serialVersionUID = 857711729279242948L;
 }