diff --git a/main/inc/lib/formvalidator/Element/Number.php b/main/inc/lib/formvalidator/Element/Number.php
index aa231a2fed..e7f0f0954e 100644
--- a/main/inc/lib/formvalidator/Element/Number.php
+++ b/main/inc/lib/formvalidator/Element/Number.php
@@ -24,6 +24,6 @@ class Number extends HTML_QuickForm_text
 
         parent::__construct($elementName, $elementLabel, $attributes);
         $this->_appendName = true;
-        $this->_type = 'number';
+        $this->setType('number');
     }
 }