diff --git a/ch06/tacocloud-api/src/main/java/tacos/web/api/OrderApiController.java b/ch06/tacocloud-api/src/main/java/tacos/web/api/OrderApiController.java
index bc4573cb..c053c331 100644
--- a/ch06/tacocloud-api/src/main/java/tacos/web/api/OrderApiController.java
+++ b/ch06/tacocloud-api/src/main/java/tacos/web/api/OrderApiController.java
@@ -63,7 +63,7 @@ public Order patchOrder(@PathVariable("orderId") Long orderId,
       order.setDeliveryState(patch.getDeliveryState());
     }
     if (patch.getDeliveryZip() != null) {
-      order.setDeliveryZip(patch.getDeliveryState());
+      order.setDeliveryZip(patch.getDeliveryZip());
     }
     if (patch.getCcNumber() != null) {
       order.setCcNumber(patch.getCcNumber());