diff --git a/config/config.inc.php b/config/config.inc.php
index b1cf624b..f8fcaec2 100755
--- a/config/config.inc.php
+++ b/config/config.inc.php
@@ -234,5 +234,5 @@ define('_PS_OS_WS_PAYMENT_', Configuration::get('PS_OS_WS_PAYMENT'));
 require_once(dirname(__FILE__).'/smarty.config.inc.php');
 $context->smarty = $smarty;
 
-define(‘CARTSGURU_IMAGE_SIZE’,  ‘small_default’);
+define("CARTSGURU_IMAGE_SIZE",  "small_default");