diff --git a/core/src/main/java/org/acegisecurity/ConfigAttribute.java b/core/src/main/java/org/acegisecurity/ConfigAttribute.java
index 24200c571b..748cd40d58 100644
--- a/core/src/main/java/org/acegisecurity/ConfigAttribute.java
+++ b/core/src/main/java/org/acegisecurity/ConfigAttribute.java
@@ -15,6 +15,9 @@
 
 package net.sf.acegisecurity;
 
+import java.io.Serializable;
+
+
 /**
  * Stores a security system related configuration attribute.
  * 
@@ -34,7 +37,7 @@ package net.sf.acegisecurity;
  * @author Ben Alex
  * @version $Id$
  */
-public interface ConfigAttribute {
+public interface ConfigAttribute extends Serializable {
     //~ Methods ================================================================
 
     /**
diff --git a/core/src/main/java/org/acegisecurity/ConfigAttributeDefinition.java b/core/src/main/java/org/acegisecurity/ConfigAttributeDefinition.java
index f87b1f6db1..9c5eed8e7b 100644
--- a/core/src/main/java/org/acegisecurity/ConfigAttributeDefinition.java
+++ b/core/src/main/java/org/acegisecurity/ConfigAttributeDefinition.java
@@ -15,6 +15,8 @@
 
 package net.sf.acegisecurity;
 
+import java.io.Serializable;
+
 import java.util.Iterator;
 import java.util.List;
 import java.util.Vector;
@@ -33,7 +35,7 @@ import java.util.Vector;
  * @author Ben Alex
  * @version $Id$
  */
-public class ConfigAttributeDefinition {
+public class ConfigAttributeDefinition implements Serializable {
     //~ Instance fields ========================================================
 
     private List configAttributes = new Vector();