diff --git a/app/models/printer/order_queue_printer.rb b/app/models/printer/order_queue_printer.rb
index 3428bb98..10757b94 100644
--- a/app/models/printer/order_queue_printer.rb
+++ b/app/models/printer/order_queue_printer.rb
@@ -31,7 +31,7 @@ class Printer::OrderQueuePrinter < Printer::PrinterWorker
                 left join bookings AS b ON b.booking_id = bo.booking_id
                 left join dining_facilities AS df ON df.dining_facility_id = b.dining_facility_id
                 left join customers as cus ON cus.customer_id = orders.customer_id")
-        .where("order_items.item_code=" + code)
+        .where("order_items.item_code='" + code + "'")
         .group("order_items.item_code")
     else 
       OrderItem.select("order_items.item_code, order_items.item_name, order_items.qty, order_items.price, order_items.item_order_by as order_by, order_items.created_at as order_at, cus.name as customer, df.name as dining")
@@ -40,7 +40,7 @@ class Printer::OrderQueuePrinter < Printer::PrinterWorker
                 left join bookings AS b ON b.booking_id = bo.booking_id
                 left join dining_facilities AS df ON df.dining_facility_id = b.dining_facility_id
                 left join customers as cus ON cus.customer_id = orders.customer_id")
-        .where("orders.order_id=" + code.to_s)
+        .where("orders.order_id='" + code.to_s + "'")
         .group("order_items.item_code")              
     end