diff --git a/lib/zin/wg/tablechart/v1.php b/lib/zin/wg/tablechart/v1.php
index 13910cffe4..9d2e10b372 100644
--- a/lib/zin/wg/tablechart/v1.php
+++ b/lib/zin/wg/tablechart/v1.php
@@ -48,6 +48,7 @@ class tableChart extends wg
 
         shuffle($colorList);
 
+        $tableTR = array();
         foreach($datas as $data)
         {
             $color = current($colorList);