diff --git a/resources/classes/orm.php b/resources/classes/orm.php
index b0668ee6df..f5cebe317e 100644
--- a/resources/classes/orm.php
+++ b/resources/classes/orm.php
@@ -136,6 +136,7 @@
 						}
 						$this->message = $message;
 						$this->result = $prep_statement->fetchAll(PDO::FETCH_NAMED);
+						unset($prep_statement);
 						$m++;
 						return $this;
 					}