diff --git a/.hgtags b/.hgtags
index 4eea1c3..fe1817e 100644
--- a/.hgtags
+++ b/.hgtags
@@ -850,6 +850,30 @@
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diff --git a/src/com/sun/org/apache/xerces/internal/jaxp/datatype/XMLGregorianCalendarImpl.java b/src/com/sun/org/apache/xerces/internal/jaxp/datatype/XMLGregorianCalendarImpl.java
index 84543ec..025aa1d 100644
--- a/src/com/sun/org/apache/xerces/internal/jaxp/datatype/XMLGregorianCalendarImpl.java
+++ b/src/com/sun/org/apache/xerces/internal/jaxp/datatype/XMLGregorianCalendarImpl.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -189,6 +189,7 @@
  * @version $Revision: 1.14 $, $Date: 2010-11-10 07:41:41 $
  * @see javax.xml.datatype.Duration
  * @since 1.5
+ * @LastModified: June 2018
  */
 
 public class XMLGregorianCalendarImpl
@@ -2730,7 +2731,7 @@
             if ((fractional.compareTo(DECIMAL_ZERO) < 0) ||
                     (fractional.compareTo(DECIMAL_ONE) > 0)) {
                 throw new IllegalArgumentException(DatatypeMessageFormatter.formatMessage(null,
-                        "InvalidFractional", new Object[]{fractional}));
+                        "InvalidFractional", new Object[]{fractional.toString()}));
             }
         }
         this.fractionalSecond = fractional;