diff --git a/app/controllers/admin/vouchers_controller.rb b/app/controllers/admin/vouchers_controller.rb
index cad08ab833..6a73bd7787 100644
--- a/app/controllers/admin/vouchers_controller.rb
+++ b/app/controllers/admin/vouchers_controller.rb
@@ -11,8 +11,7 @@ module Admin
     def create
       # In the scenario where you get an error when trying to create a percentage voucher, we'll
       # now have percentage rate voucher instanciated. Hence why we check for both params type
-      voucher_type = params.dig(:vouchers_flat_rate, :voucher_type) ||
-                     params[:vouchers_percentage_rate][:voucher_type]
+      voucher_type = params.dig(:voucher, :voucher_type)
 
       # The use of "safe_constantize" here will trigger a Brakeman error, it can safely be ignored
       # as it's a false positive : https://github.com/openfoodfoundation/openfoodnetwork/pull/10821
@@ -48,11 +47,7 @@ module Admin
     end
 
     def permitted_resource_params
-      if params[:vouchers_flat_rate].present?
-        return params.require(:vouchers_flat_rate).permit(:code, :amount)
-      end
-
-      params.require(:vouchers_percentage_rate).permit(:code, :amount)
+      params.require(:voucher).permit(:code, :amount)
     end
   end
 end
diff --git a/app/views/admin/vouchers/new.html.haml b/app/views/admin/vouchers/new.html.haml
index a27ea65d7a..77eff6d903 100644
--- a/app/views/admin/vouchers/new.html.haml
+++ b/app/views/admin/vouchers/new.html.haml
@@ -1,4 +1,4 @@
-= form_with model: @voucher, url: admin_enterprise_vouchers_path(@enterprise), html: { name: "voucher_form" } do |f|
+= form_with model: @voucher.becomes(Voucher), url: admin_enterprise_vouchers_path(@enterprise), html: { name: "voucher_form" } do |f|
   .row
     .sixteen.columns.alpha
       .four.columns.alpha.text-right
diff --git a/spec/requests/admin/vouchers_controller_spec.rb b/spec/requests/admin/vouchers_controller_spec.rb
index 935255fff7..04e4c001c5 100644
--- a/spec/requests/admin/vouchers_controller_spec.rb
+++ b/spec/requests/admin/vouchers_controller_spec.rb
@@ -26,7 +26,7 @@ describe Admin::VouchersController, type: :request do
 
     let(:params) do
       {
-        vouchers_flat_rate: {
+        voucher: {
           code: code,
           amount: amount,
           voucher_type: type
@@ -52,7 +52,7 @@ describe Admin::VouchersController, type: :request do
     context "with a percentage rate voucher" do
       let(:params) do
         {
-          vouchers_percentage_rate: {
+          voucher: {
             code: code,
             amount: amount,
             voucher_type: type