diff --git a/internal/service/order_service.go b/internal/service/order_service.go
index e077742..33d334a 100644
--- a/internal/service/order_service.go
+++ b/internal/service/order_service.go
@@ -483,7 +483,7 @@ func (s *OrderServiceImpl) validateCreatePaymentRequest(req *models.CreatePaymen
 				return fmt.Errorf("order item ID is required for payment item %d", i+1)
 			}
 
-			if item.Amount <= 0 {
+			if item.Amount < 0 {
 				return fmt.Errorf("payment item amount must be greater than zero for item %d", i+1)
 			}