diff --git a/MysqliDb.php b/MysqliDb.php
index a90e2805..0eefc0fd 100644
--- a/MysqliDb.php
+++ b/MysqliDb.php
@@ -1848,23 +1848,6 @@ protected function _prepareQuery()
         return $stmt;
     }
 
-    /**
-     * Close connection
-     * 
-     * @return void
-     */
-    public function __destruct()
-    {
-        if ($this->isSubQuery) {
-            return;
-        }
-
-        if ($this->_mysqli) {
-            $this->_mysqli->close();
-            $this->_mysqli = null;
-        }
-    }
-
     /**
      * Referenced data array is required by mysqli since PHP 5.3+
      *