diff --git a/module/chart/model.php b/module/chart/model.php
index a6bf2c25d6..347c5f2502 100644
--- a/module/chart/model.php
+++ b/module/chart/model.php
@@ -313,8 +313,7 @@ class chartModel extends model
         $maxCount = 50;
         if(empty($date)) arsort($stat);
 
-        $copyStat = $stat;
-        $other = array_sum(array_splice($copyStat, $maxCount));
+        $other = array_sum(array_splice($stat, $maxCount));
         $stat[$this->lang->chart->other] = $other;
         if(empty($date)) arsort($stat);