diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index 3a3181e14a5..226d367140b 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -111,6 +111,9 @@ class ExtraFields
 	{
 		$this->db = $db;
 		$this->error = array();
+		$this->attributes = array();
+
+		// For old usage
 		$this->attribute_elementtype = array();
 		$this->attribute_type = array();
 		$this->attribute_label = array();