diff --git a/src/main/java/com/sailthru/sqs/MParticleClient.java b/src/main/java/com/sailthru/sqs/MParticleClient.java
index 8d2ce89..8aeabf2 100644
--- a/src/main/java/com/sailthru/sqs/MParticleClient.java
+++ b/src/main/java/com/sailthru/sqs/MParticleClient.java
@@ -75,7 +75,7 @@ private Batch prepareBatch(final MParticleOutgoingMessage message) {
 
             customEvent.getData().customAttributes(event.getAdditionalData());
 
-            batch.addEventsItem(event);
+            batch.addEventsItem(customEvent);
         });
 
         return batch;