diff --git a/paypal/express/views.py b/paypal/express/views.py
index 69fa0e9f..d94fff54 100644
--- a/paypal/express/views.py
+++ b/paypal/express/views.py
@@ -259,7 +259,8 @@ def handle_payment(self, order_number, total_incl_tax, **kwargs):
                         amount_allocated=txn.amount,
                         amount_debited=txn.amount)
         self.add_payment_source(source)
-        self.add_payment_event('Settled', txn.amount)
+        self.add_payment_event('Settled', txn.amount,
+                               reference=txn.correlation_id)
 
     def create_shipping_address(self, basket=None):
         """