diff --git a/core/lib/Thelia/Config/Resources/config.xml b/core/lib/Thelia/Config/Resources/config.xml
index c8d0ef53f..b163f1983 100755
--- a/core/lib/Thelia/Config/Resources/config.xml
+++ b/core/lib/Thelia/Config/Resources/config.xml
@@ -67,6 +67,10 @@
             <tag name="thelia.parser.register_plugin"/>
         </service>
 
+        <service id="smarty.plugin.theliasyntax" class="Thelia\Core\Template\Smarty\Plugins\TheliaSyntax" >
+            <tag name="thelia.parser.register_plugin"/>
+        </service>
+
         <service id="smarty.plugin.thelialoop" class="Thelia\Core\Template\Smarty\Plugins\TheliaLoop" scope="request">
             <tag name="thelia.parser.register_plugin"/>
 
diff --git a/core/lib/Thelia/Core/Template/Element/LoopResultRow.php b/core/lib/Thelia/Core/Template/Element/LoopResultRow.php
index 73d2f937a..3ac05fe5c 100755
--- a/core/lib/Thelia/Core/Template/Element/LoopResultRow.php
+++ b/core/lib/Thelia/Core/Template/Element/LoopResultRow.php
@@ -29,7 +29,7 @@ class LoopResultRow
 
     public function set($key, $value)
     {
-        $this->substitution[$key] = $value;
+        $this->substitution[$key] = $value === null ? '' : $value;
     }
 
     public function get($key)
diff --git a/core/lib/Thelia/Core/Template/Smarty/Plugins/TheliaSyntax.php b/core/lib/Thelia/Core/Template/Smarty/Plugins/TheliaSyntax.php
new file mode 100644
index 000000000..9b508cf3e
--- /dev/null
+++ b/core/lib/Thelia/Core/Template/Smarty/Plugins/TheliaSyntax.php
@@ -0,0 +1,54 @@
+<?php
+/*************************************************************************************/
+/*                                                                                   */
+/*      Thelia	                                                                     */
+/*                                                                                   */
+/*      Copyright (c) OpenStudio                                                     */
+/*	    email : info@thelia.net                                                      */
+/*      web : http://www.thelia.net                                                  */
+/*                                                                                   */
+/*      This program is free software; you can redistribute it and/or modify         */
+/*      it under the terms of the GNU General Public License as published by         */
+/*      the Free Software Foundation; either version 3 of the License                */
+/*                                                                                   */
+/*      This program is distributed in the hope that it will be useful,              */
+/*      but WITHOUT ANY WARRANTY; without even the implied warranty of               */
+/*      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                */
+/*      GNU General Public License for more details.                                 */
+/*                                                                                   */
+/*      You should have received a copy of the GNU General Public License            */
+/*	    along with this program. If not, see <http://www.gnu.org/licenses/>.         */
+/*                                                                                   */
+/*************************************************************************************/
+namespace Thelia\Core\Template\Smarty\Plugins;
+
+use Thelia\Core\Template\Smarty\SmartyPluginDescriptor;
+use Thelia\Core\Template\Smarty\SmartyPluginInterface;
+
+/**
+ * Class TheliaSyntax
+ * @package Thelia\Core\Template\Smarty\Plugins
+ *
+ * @author Etienne Roudeix <eroudeix@openstudio.fr>
+ */
+class TheliaSyntax implements SmartyPluginInterface
+{
+    public function dieseCancel($value, $diese)
+    {
+        if($value === null) {
+            return $diese;
+        }
+
+        return $value;
+    }
+
+    /**
+     * @return SmartyPluginDescriptor[]
+     */
+    public function getPluginDescriptors()
+    {
+        return array(
+            new SmartyPluginDescriptor("modifier", "dieseCanceller", $this, "dieseCancel")
+        );
+    }
+}
diff --git a/core/lib/Thelia/Core/Template/Smarty/SmartyParser.php b/core/lib/Thelia/Core/Template/Smarty/SmartyParser.php
index ac83bf57e..8e34a89ed 100755
--- a/core/lib/Thelia/Core/Template/Smarty/SmartyParser.php
+++ b/core/lib/Thelia/Core/Template/Smarty/SmartyParser.php
@@ -29,10 +29,11 @@ class SmartyParser extends Smarty implements ParserInterface
     protected $status = 200;
 
     /**
-     * @param \Symfony\Component\HttpFoundation\Request                   $request
-     * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $dispatcher
-     * @param bool                                                        $template
-     * @param string                                                      $env        Environment define for the kernel application. Used for the cache directory
+     * @param Request                  $request
+     * @param EventDispatcherInterface $dispatcher
+     * @param bool                     $template
+     * @param string                   $env
+     * @param bool                     $debug
      */
     public function __construct(Request $request, EventDispatcherInterface $dispatcher, $template = false, $env = "prod", $debug = false)
     {
@@ -78,7 +79,7 @@ class SmartyParser extends Smarty implements ParserInterface
     public function preThelia($tpl_source, \Smarty_Internal_Template $template)
     {
         $new_source = preg_replace('`{#([a-zA-Z][a-zA-Z0-9\-_]*)(.*)}`', '{\$$1$2}', $tpl_source);
-        $new_source = preg_replace('`#([a-zA-Z][a-zA-Z0-9\-_]*)`', '{\$$1|default:\'#$1\'}', $new_source);
+        $new_source = preg_replace('`#([a-zA-Z][a-zA-Z0-9\-_]*)`', '{\$$1|dieseCanceller:\'#$1\'}', $new_source);
 
         return $new_source;
     }
diff --git a/templates/smarty-sample/category.html b/templates/smarty-sample/category.html
index 8a0dc2dba..b99390cb6 100755
--- a/templates/smarty-sample/category.html
+++ b/templates/smarty-sample/category.html
@@ -19,10 +19,11 @@
     <hr />
 {/loop*}
 <h2>PRODUCTS</h2>
-{loop name="product" type="product" min_weight="2.5" max_weight="10"}
+{loop name="product" type="product"}
     <h3>PRODUCT : #REF / #TITLE</h3>
     price : #PRICE €<br />
     promo price : #PROMO_PRICE €<br />
     is promo : #PROMO<br />
+    is new : #NEW<br />
     weight : #WEIGHT<br />
 {/loop}