diff --git a/module/metric/zen.php b/module/metric/zen.php
index 3837508759..f184bcfb8a 100644
--- a/module/metric/zen.php
+++ b/module/metric/zen.php
@@ -419,7 +419,7 @@ class metricZen extends metric
 
         $statement = $statement->query();
 
-        while($row = $stmt->fetch())
+        while($row = $statement->fetch())
         {
             foreach($calcList as $code => $calc)
             {