diff --git a/webapp/controller/BigwheelController.class.php b/webapp/controller/BigwheelController.class.php
index 6a4a4e9d..b5b11565 100644
--- a/webapp/controller/BigwheelController.class.php
+++ b/webapp/controller/BigwheelController.class.php
@@ -337,13 +337,13 @@ class BigwheelController extends BaseAuthedController {
 
         myself()->_rspData(array(
             'award' => $this->awardService->toDto(),
-            'property_chg' => $this->propertyChgService->toDto(),
+             'property_chg' => $this->propertyChgService->toDto(),
             'info' => $info
         ));
-        myself()->_fireEvent('Bigwheel', 'onBuyOk', array(
-            'grid_id' => $gridId,
-            'buy_price' => $gridRef['buy_price'],
-        ));
+        myself()->_fireEvent('Bigwheel', 'onBuyOk',
+            $gridId,
+            $gridRef['buy_price']
+        );
     }
 
     private function getMidDataKey()
diff --git a/webapp/events/Bigwheel.php b/webapp/events/Bigwheel.php
index 3774777b..9296b16d 100644
--- a/webapp/events/Bigwheel.php
+++ b/webapp/events/Bigwheel.php
@@ -12,6 +12,10 @@ class Bigwheel
 
     public static function onBuyOk($gridId, $buyPrice)
     {
+        myself()->_addTgLog('Bigwheel.buyOk', array(
+            'gridId' => $gridId,
+            'buyPrice' => $buyPrice
+        ));
     }
 
 }