diff --git a/core/lib/Thelia/Core/FileFormat/Formatting/FormatterData.php b/core/lib/Thelia/Core/FileFormat/Formatting/FormatterData.php
index 6b81aa664..9d048e543 100644
--- a/core/lib/Thelia/Core/FileFormat/Formatting/FormatterData.php
+++ b/core/lib/Thelia/Core/FileFormat/Formatting/FormatterData.php
@@ -232,7 +232,7 @@ class FormatterData
         return $this->reverseAliases($this->data, $this->aliases);
     }
 
-    public function setLang(Lang $lang)
+    public function setLang(Lang $lang = null)
     {
         $this->lang = $lang;