diff --git a/ykval-export.php b/ykval-export.php
index 6905b10..45245ac 100755
--- a/ykval-export.php
+++ b/ykval-export.php
@@ -36,6 +36,7 @@ while($row = $result->fetch(PDO::FETCH_ASSOC)){
     "\n";
  }
 
+$result=null;
 $db=null;