diff --git a/webht/third_party/paypal/models/paypal_model.php b/webht/third_party/paypal/models/paypal_model.php
index 0f8697f5..0c53cc56 100644
--- a/webht/third_party/paypal/models/paypal_model.php
+++ b/webht/third_party/paypal/models/paypal_model.php
@@ -607,8 +607,8 @@ class Paypal_model extends CI_Model {
     {
         $sql = "SELECT top 1 * from BIZ_ConfirmLineInfo
                 WHERE 1=1 ";
-        $tp_order ? $sql.=" and COLI_PriceMemo=$tp_order " : "";
-        $real_orderid ? $sql.=" and COLI_ID=$real_orderid " : "";
+        $tp_order ? $sql.=" and COLI_PriceMemo='$tp_order' " : "";
+        $real_orderid ? $sql.=" and COLI_ID='$real_orderid' " : "";
         return $this->HT->query($sql)->row();
     }