diff --git a/app/models/sale.rb b/app/models/sale.rb
index 779e5f91..1f2d591a 100644
--- a/app/models/sale.rb
+++ b/app/models/sale.rb
@@ -82,7 +82,7 @@ class Sale < ApplicationRecord
       self.tax_type = "exclusive"
 
       # set cashier
-      if order_source = "emenu"
+      if order_source.downcase == "emenu"
         table = DiningFacility.find(booking.dining_facility_id)
         cashier_zone = CashierTerminalByZone.find_by_zone_id(table.zone_id)
         shift = ShiftSale.where("shift_started_at is not null and shift_closed_at is null and cashier_terminal_id = #{cashier_zone.cashier_terminal_id}").first