diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7fea153..2ffa5d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.2.1
+
+* Fix a bug when using the method `getOneByCustomer` on card service
+
 ## 1.2.0
 
 * Update mapping so that when fetching a subscription, plan and (eventual) discount are loaded eagerly instead of
diff --git a/src/Service/CardService.php b/src/Service/CardService.php
index ee86da3..80cbfb4 100644
--- a/src/Service/CardService.php
+++ b/src/Service/CardService.php
@@ -160,7 +160,7 @@ public function getById($id)
      */
     public function getOneByCustomer(CustomerInterface $customer)
     {
-        return $this->cardRepository->findOneBy(['customer' => $customer]);
+        return $this->cardRepository->findOneBy(['owner' => $customer]);
     }
 
     /**