--- a/langtools/src/share/classes/com/sun/tools/apt/comp/UsageMessageNeededException.java	Tue Jan 20 15:17:45 2009 -0800
+++ b/langtools/src/share/classes/com/sun/tools/apt/comp/UsageMessageNeededException.java	Tue Jan 20 18:23:13 2009 -0800
@@ -26,4 +26,6 @@
 package com.sun.tools.apt.comp;
 
 
-public class UsageMessageNeededException extends RuntimeException {}
+public class UsageMessageNeededException extends RuntimeException {
+    private static final long serialVersionUID = -3265159608992825840L;
+}