diff --git a/oxm/src/main/java/org/springframework/oxm/xstream/XStreamMarshaller.java b/oxm/src/main/java/org/springframework/oxm/xstream/XStreamMarshaller.java
index a3ef3951..839fa2c7 100644
--- a/oxm/src/main/java/org/springframework/oxm/xstream/XStreamMarshaller.java
+++ b/oxm/src/main/java/org/springframework/oxm/xstream/XStreamMarshaller.java
@@ -270,7 +270,7 @@ public class XStreamMarshaller extends AbstractMarshaller {
      * @see XStream#omitField(Class, String)
      */
     public void addOmittedField(Class type, String fieldName) {
-        xstream.omitField(type, fieldName);
+        getXStream().omitField(type, fieldName);
     }
 
     /**