diff --git a/index.php b/index.php
index 922feaadc9..575e6cb298 100644
--- a/index.php
+++ b/index.php
@@ -22,9 +22,9 @@ $config = dirname(__FILE__) . '/protected/config/main.php';
 $appClass = dirname(__FILE__) . '/protected/components/WebApplication.php';
 
 // enable the following 3 lines when in development/testing
-defined('YII_DEBUG') or define('YII_DEBUG', true);
-defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL', 3);
-ini_set('error_reporting', E_ALL);
+#defined('YII_DEBUG') or define('YII_DEBUG', true);
+#defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL', 3);
+#ini_set('error_reporting', E_ALL);
 
 require_once($yii);
 require_once($appClass);