diff --git a/backend/internal/payment/types.go b/backend/internal/payment/types.go
index d0e6f54d59..5d613a4a9d 100644
--- a/backend/internal/payment/types.go
+++ b/backend/internal/payment/types.go
@@ -148,7 +148,7 @@ type RefundResponse struct {
 // InstanceSelection holds the selected provider instance and its decrypted config.
 type InstanceSelection struct {
 	InstanceID     string
-	ProviderKey    string            // Provider key of the selected instance (e.g. "alipay", "easypay")
+	ProviderKey    string // Provider key of the selected instance (e.g. "alipay", "easypay")
 	Config         map[string]string
 	SupportedTypes string // Comma-separated list of supported payment types from the instance
 	PaymentMode    string // Payment display mode: "qrcode", "redirect", "popup"