diff --git a/htdocs/projet/tasks/list.php b/htdocs/projet/tasks/list.php
index 53b1a85e889..77a287f2e05 100644
--- a/htdocs/projet/tasks/list.php
+++ b/htdocs/projet/tasks/list.php
@@ -604,7 +604,9 @@ print '<input type="hidden" name="action" value="list">';
 print '<input type="hidden" name="formfilteraction" id="formfilteraction" value="list">';
 print '<input type="hidden" name="sortfield" value="'.$sortfield.'">';
 print '<input type="hidden" name="sortorder" value="'.$sortorder.'">';
-print '<input type="hidden" name="type" value="'.$type.'">';
+if (!empty($type)) {
+	print '<input type="hidden" name="type" value="'.$type.'">';
+}
 print '<input type="hidden" name="contextpage" value="'.$contextpage.'">';
 
 // Show description of content