diff --git a/webapp/controller/RechargeController.class.php b/webapp/controller/RechargeController.class.php
index 0b9975c..ab2089d 100644
--- a/webapp/controller/RechargeController.class.php
+++ b/webapp/controller/RechargeController.class.php
@@ -199,7 +199,11 @@ class RechargeController
 
                 $firstdata = $rechargerow['first_data'];
                 if ($firstrecharge) {
-                    $firstdata = $rechargerow['first_data'] . ',' . $goodsid;
+                    if ($firstdata == NULL || $firstdata == '') {
+                        $firstdata = $goodsid;
+                    } else {
+                        $firstdata = $rechargerow['first_data'] . ',' . $goodsid;
+                    }
                 } else {
                     $diamond_present = 0;
                 }