diff --git a/api/service/coupon.go b/api/service/coupon.go
index c33951b..adf19ec 100644
--- a/api/service/coupon.go
+++ b/api/service/coupon.go
@@ -314,7 +314,7 @@ func (r *CouponService) PutSystemCoupon(couponId int64, req requests.PutSystemCo
 		if len(req.InquiryType) > 0 {
 			inquiryType := strings.Join(req.InquiryType, ",")
 			if inquiryType != coupon.InquiryType {
-				couponData["inquiry_type"] = req.InquiryType
+				couponData["inquiry_type"] = inquiryType
 			}
 		}
 	}