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diff --git a/libjava/classpath/java/io/InvalidClassException.java b/libjava/classpath/java/io/InvalidClassException.java
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+/* InvalidClassException.java -- deserializing a class failed
+   Copyright (C) 1998, 2002 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.io;
+
+/**
+ * This exception is thrown when there is some sort of problem with a
+ * class during a serialization operation.  This could be:<br><ul>
+ * <li>the serial version of the class doesn't match</li>
+ * <li>the class contains unknown datatypes</li>
+ * <li>the class does not have an accessible no-arg constructor</li>
+ * </ul>.
+ *
+ * <p>The field <code>classname</code> will contain the name of the
+ * class that caused the problem if known.  The getMessage() method
+ * for this exception will always include the name of that class
+ * if known.
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @since 1.1
+ * @status updated to 1.4
+ */
+public class InvalidClassException extends ObjectStreamException
+{
+  /**
+   * Compatible with JDK 1.1+.
+   */
+  private static final long serialVersionUID = -4333316296251054416L;
+
+  /**
+   * The name of the class which encountered the error.
+   *
+   * @serial the classname causing the error
+   */
+  public String classname;
+
+  /**
+   * Create an exception with a descriptive error message, but a null
+   * classname.
+   *
+   * @param message the descriptive error message
+   */
+  public InvalidClassException(String message)
+  {
+    super(message);
+  }
+
+  /**
+   * Create an exception with a descriptive error message, and the name of
+   * the class that caused the problem.
+   *
+   * @param classname the name of the faulty class
+   * @param message the descriptive error message
+   */
+  public InvalidClassException(String classname, String message)
+  {
+    super(message);
+    this.classname = classname;
+  }
+
+  /**
+   * Returns the descriptive error message for this exception. It will
+   * include the class name that caused the problem if known, in the format:
+   * <code>[classname][; ][super.getMessage()]</code>.
+   *
+   * @return A descriptive error message, may be null
+   */
+  public String getMessage()
+  {
+    String msg = super.getMessage();
+    if (msg == null)
+      return classname;
+    return (classname == null ? "" : classname + "; ") + msg;
+  }
+}
+