diff --git a/app/controllers/split_checkout_controller.rb b/app/controllers/split_checkout_controller.rb
index ed41eb1609..17d7f36dbd 100644
--- a/app/controllers/split_checkout_controller.rb
+++ b/app/controllers/split_checkout_controller.rb
@@ -112,7 +112,7 @@ class SplitCheckoutController < ::BaseController
   def recalculate_voucher
     return if @order.voucher_adjustments.empty?
 
-    return if @order.shipment.shipping_method.id == params[:shipping_method_id].to_i
+    return if @order.shipping_method&.id == params[:shipping_method_id].to_i
 
     VoucherAdjustmentsService.new(@order).update
   end
diff --git a/spec/controllers/split_checkout_controller_spec.rb b/spec/controllers/split_checkout_controller_spec.rb
index c6c24e52b7..e6aee5c82e 100644
--- a/spec/controllers/split_checkout_controller_spec.rb
+++ b/spec/controllers/split_checkout_controller_spec.rb
@@ -223,6 +223,20 @@ describe SplitCheckoutController, type: :controller do
 
               expect(response).to redirect_to checkout_step_path(:payment)
             end
+
+            context "when no shipments available" do
+              before do
+                order.shipments.destroy_all
+              end
+
+              it "recalculates the voucher adjustment" do
+                expect(service).to receive(:update)
+
+                put(:update, params:)
+
+                expect(response).to redirect_to checkout_step_path(:payment)
+              end
+            end
           end
         end
       end