diff --git a/app/serializers/api/order_detailed_serializer.rb b/app/serializers/api/order_detailed_serializer.rb
index 5fa36dcddc..fd625b6936 100644
--- a/app/serializers/api/order_detailed_serializer.rb
+++ b/app/serializers/api/order_detailed_serializer.rb
@@ -12,7 +12,7 @@ module Api
 
     def adjustments
       adjustments = object.all_adjustments.where(
-        adjustable_type: ["Spree::Order", "Spree::Shipment"]
+        adjustable_type: ["Spree::Order", "Spree::Shipment", "Spree::Payment"]
       ).order(label: :desc)
       ActiveModel::ArraySerializer.new(adjustments, each_serializer: Api::AdjustmentSerializer)
     end
diff --git a/spec/controllers/api/orders_controller_spec.rb b/spec/controllers/api/orders_controller_spec.rb
index 2dfd2dd035..0bda9d464d 100644
--- a/spec/controllers/api/orders_controller_spec.rb
+++ b/spec/controllers/api/orders_controller_spec.rb
@@ -244,7 +244,7 @@ module Api
 
           expect(json_response[:adjustments].first).to include(
             'label' => "Transaction fee",
-            'amount' => order.adjustments.payment_fee.first.amount.to_s
+            'amount' => order.all_adjustments.payment_fee.first.amount.to_s
           )
           expect(json_response[:adjustments].second).to include(
             'label' => "Shipping",