diff --git a/hwe/sammo/API/Betting/Bet.php b/hwe/sammo/API/Betting/Bet.php
index 3102eb89..91005cb5 100644
--- a/hwe/sammo/API/Betting/Bet.php
+++ b/hwe/sammo/API/Betting/Bet.php
@@ -134,7 +134,11 @@ class Bet extends \sammo\BaseAPI
             'amount'=>$amount
         ]);
 
-        $db->insertUpdate('ng_betting', $bettingItem->toArray());
+        $db->insertUpdate(
+            'ng_betting',
+            $bettingItem->toArray(),
+            ['amount' => $db->sqleval('amount + %i', $amount)]
+        );
         if($bettingInfo->reqInheritancePoint){
             $inheritStor->setValue('previous', [$remainPoint - $amount, null]);
         }