diff --git a/lib/paypal_express/private_api.rb b/lib/paypal_express/private_api.rb
index 3169c64..cb786b0 100644
--- a/lib/paypal_express/private_api.rb
+++ b/lib/paypal_express/private_api.rb
@@ -25,8 +25,8 @@ def initiate_express_checkout(kb_account_id, kb_tenant_id, amount_in_cents=0, cu
 
         if with_baid
           options[:billing_agreement]               ||= {}
-          options[:billing_agreement][:type]        ||= 'MerchantInitiatedBilling'
-          options[:billing_agreement][:description] ||= 'Kill Bill billing agreement'
+          options[:billing_agreement][:type]        ||= options[:billing_agreement_type] || 'MerchantInitiatedBilling'
+          options[:billing_agreement][:description] ||= options[:billing_agreement_description] || 'Kill Bill billing agreement'
         end
 
         # Go to Paypal (SetExpressCheckout call)