diff --git a/htdocs/user/class/user.class.php b/htdocs/user/class/user.class.php
index b47781a9db4..ee6d0e7bd14 100644
--- a/htdocs/user/class/user.class.php
+++ b/htdocs/user/class/user.class.php
@@ -3796,7 +3796,7 @@ class User extends CommonObject
 			foreach ($filter as $key => $value) {
 				if ($key == 't.rowid') {
 					$sqlwhere[] = $key." = ".((int) $value);
-				} elseif (in_array($this->fields[$key]['type'], array('date', 'datetime', 'timestamp'))) {
+				} elseif (isset($this->fields[$key]['type']) && in_array($this->fields[$key]['type'], array('date', 'datetime', 'timestamp'))) {
 					$sqlwhere[] = $key." = '".$this->db->idate($value)."'";
 				} elseif ($key == 'customsql') {
 					$sqlwhere[] = $value;