Index: src/java/org/apache/nutch/crawl/NutchWritable.java
===================================================================
--- src/java/org/apache/nutch/crawl/NutchWritable.java	(revision 1665465)
+++ src/java/org/apache/nutch/crawl/NutchWritable.java	(working copy)
@@ -29,6 +29,7 @@
         org.apache.hadoop.io.NullWritable.class,
         org.apache.hadoop.io.BooleanWritable.class,
         org.apache.hadoop.io.LongWritable.class,
+        org.apache.hadoop.io.ByteWritable.class,
         org.apache.hadoop.io.BytesWritable.class,
         org.apache.hadoop.io.FloatWritable.class,
         org.apache.hadoop.io.IntWritable.class,