diff --git a/server/core_purchase.go b/server/core_purchase.go
index c927cea387f84eb768d0aa8341ec8b104ddde40f..5809782d9f4ca8e17a99caecf0912b2f44dbbf0c 100644
--- a/server/core_purchase.go
+++ b/server/core_purchase.go
@@ -36,7 +36,7 @@ type PurchaseService struct {
 func NewPurchaseService(jsonLogger *zap.Logger, multiLogger *zap.Logger, db *sql.DB, config *PurchaseConfig) *PurchaseService {
 	ac, err := iap.NewAppleClient(config.Apple.Password, config.Apple.Production, config.Apple.TimeoutMs)
 	if err != nil {
-		multiLogger.Warn("Skip initialising Apple in-app purchase provider", zap.String("reason,", err.Error()))
+		multiLogger.Warn("Skip initialising Apple in-app purchase provider", zap.String("reason", err.Error()))
 	} else {
 		if config.Apple.Production {
 			multiLogger.Info("Apple in-app purchase environment is set to Production priority.")