diff --git a/java/external/src/javax/xml/datatype/FactoryFinder.java b/java/external/src/javax/xml/datatype/FactoryFinder.java
index dff7f74..b6994c7 100644
--- a/java/external/src/javax/xml/datatype/FactoryFinder.java
+++ b/java/external/src/javax/xml/datatype/FactoryFinder.java
@@ -320,6 +320,8 @@ class FactoryFinder {
 	 * <p>Configuration Error.</p>
 	 */
     static class ConfigurationError extends Error {
+        
+        private static final long serialVersionUID = -3644413026244211347L;
     	
     	/**
     	 * <p>Exception that caused the error.</p>