diff --git a/inc/fieldinterface.class.php b/inc/fieldinterface.class.php
index f11239152..aac5ad30b 100644
--- a/inc/fieldinterface.class.php
+++ b/inc/fieldinterface.class.php
@@ -251,7 +251,7 @@ public function getHtmlIcon();
     * @param boolean $canEdit true if the user can edit the answer
     * @return string HTML code
     */
-   public function getRenderedHtml($canEdit);
+   public function getRenderedHtml($canEdit = true);
 
    /**
     * Is the field editable ?