diff --git a/unipay/init.py b/unipay/init.py
index b3650fc..b7890e4 100644
--- a/unipay/init.py
+++ b/unipay/init.py
@@ -58,7 +58,7 @@ async def create_payment(request, params_kw=None):
 			raise e
 		notify_url = env.entire_url(f'providers/{provider}')
 		pl = PaymentLog(request._run_ns)
-		fee = await get_pay_fee(provider, amount)
+		fee = await get_pay_fee(provider, data.amount)
 		channel = get_provider_channel(provider)
 		userid = await get_user()
 		orgid = await get_userorgid()