diff --git a/src/services/serverMethods/index.ts b/src/services/serverMethods/index.ts
index e598d248..3502fc9d 100644
--- a/src/services/serverMethods/index.ts
+++ b/src/services/serverMethods/index.ts
@@ -49,7 +49,7 @@ export default (mainHandler: Main): Types.ServerMethods => {
             const err = Types.PayAddressRequestValidate(req, {
                 address_CustomCheck: addr => addr !== '',
                 amoutSats_CustomCheck: amt => amt > 0,
-                targetConf_CustomCheck: target => target > 0
+                satsPerVByte_CustomCheck: spb => spb > 0
             })
             if (err != null) throw new Error(err.message)
             return mainHandler.paymentManager.PayAddress(ctx.user_id, req)