diff --git a/client/java/solrj/src/org/apache/solr/client/solrj/SolrRequest.java b/client/java/solrj/src/org/apache/solr/client/solrj/SolrRequest.java
index b7b77f9d7f4..4b442e66c89 100644
--- a/client/java/solrj/src/org/apache/solr/client/solrj/SolrRequest.java
+++ b/client/java/solrj/src/org/apache/solr/client/solrj/SolrRequest.java
@@ -18,6 +18,7 @@
 package org.apache.solr.client.solrj;
 
 import java.io.IOException;
+import java.io.Serializable;
 import java.util.Collection;
 
 import org.apache.solr.common.params.SolrParams;
@@ -28,7 +29,7 @@ import org.apache.solr.common.util.ContentStream;
  * @version $Id$
  * @since solr 1.3
  */
-public interface SolrRequest 
+public interface SolrRequest extends Serializable
 {
   public enum METHOD {
     GET,
diff --git a/src/java/org/apache/solr/common/SolrInputDocument.java b/src/java/org/apache/solr/common/SolrInputDocument.java
index 21a352f8087..67d5f2ea822 100644
--- a/src/java/org/apache/solr/common/SolrInputDocument.java
+++ b/src/java/org/apache/solr/common/SolrInputDocument.java
@@ -17,6 +17,7 @@
 
 package org.apache.solr.common;
 
+import java.io.Serializable;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
@@ -30,7 +31,7 @@ import java.util.Collection;
  * @version $Id$
  * @since solr 1.3
  */
-public class SolrInputDocument implements Iterable<SolrInputField>
+public class SolrInputDocument implements Iterable<SolrInputField>, Serializable
 {
   private final Map<String,SolrInputField> _fields;
   private float _documentBoost = 1.0f;
diff --git a/src/java/org/apache/solr/common/SolrInputField.java b/src/java/org/apache/solr/common/SolrInputField.java
index 19466a721d7..5e9102ccdac 100644
--- a/src/java/org/apache/solr/common/SolrInputField.java
+++ b/src/java/org/apache/solr/common/SolrInputField.java
@@ -17,6 +17,7 @@
 
 package org.apache.solr.common;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Iterator;
@@ -25,7 +26,7 @@ import java.util.Iterator;
  * @version $Id$
  * @since solr 1.3
  */
-public class SolrInputField implements Iterable<Object>
+public class SolrInputField implements Iterable<Object>, Serializable
 {
   String name;
   Object value = null; 
diff --git a/src/java/org/apache/solr/common/params/SolrParams.java b/src/java/org/apache/solr/common/params/SolrParams.java
index 7029b7a0913..4b96fb14106 100644
--- a/src/java/org/apache/solr/common/params/SolrParams.java
+++ b/src/java/org/apache/solr/common/params/SolrParams.java
@@ -17,6 +17,7 @@
 
 package org.apache.solr.common.params;
 
+import java.io.Serializable;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
@@ -29,7 +30,7 @@ import org.apache.solr.common.util.SimpleOrderedMap;
  *
  * @version $Id$
  */
-public abstract class SolrParams {
+public abstract class SolrParams implements Serializable {
   
   /** returns the String value of a param, or null if not set */
   public abstract String get(String param);