diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index ec02f906e70..f72ddc8d6e2 100755
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -44,6 +44,10 @@ class ExtraFields
 	var $attribute_unique;
 	// Array to store if attribute is required or not
 	var $attribute_required;
+	// Array to store parameters of attribute (used in select type)
+	var $attribute_param;
+	// Int to store position of attribute
+	var $attribute_pos;
 
 	var $error;
 	var $errno;