diff --git a/htdocs/ticket/class/ticket.class.php b/htdocs/ticket/class/ticket.class.php
index 62af2e606e878..491d62747d3a2 100644
--- a/htdocs/ticket/class/ticket.class.php
+++ b/htdocs/ticket/class/ticket.class.php
@@ -759,11 +759,11 @@ public function fetch($id = 0, $ref = '', $track_id = '', $email_msgid = '')
 				$this->type_label = $label_type;
 
 				$this->category_code = $obj->category_code;
-				$label_category = ($langs->trans("TicketCategoryShort".$obj->category_code) != "TicketCategoryShort".$obj->category_code ? $langs->trans("TicketCategoryShort".$obj->category_code) : ($obj->category_label != '-' ? $obj->category_label : ''));
+				$label_category = ($langs->trans("TicketCategoryShort".$obj->category_code) != "TicketCategoryShort".$obj->category_code ? $langs->trans("TicketCategoryShort".$obj->category_code) : (isset($obj->category_label) && $obj->category_label != '-' ? $obj->category_label : ''));
 				$this->category_label = $label_category;
 
 				$this->severity_code = $obj->severity_code;
-				$label_severity = ($langs->trans("TicketSeverityShort".$obj->severity_code) != "TicketSeverityShort".$obj->severity_code ? $langs->trans("TicketSeverityShort".$obj->severity_code) : ($obj->severity_label != '-' ? $obj->severity_label : ''));
+				$label_severity = ($langs->trans("TicketSeverityShort".$obj->severity_code) != "TicketSeverityShort".$obj->severity_code ? $langs->trans("TicketSeverityShort".$obj->severity_code) : (isset($obj->severity_label) && $obj->severity_label != '-' ? $obj->severity_label : ''));
 				$this->severity_label = $label_severity;
 
 				$this->datec = $this->db->jdate($obj->datec);
@@ -949,11 +949,11 @@ public function fetchAll($user, $sortorder = 'ASC', $sortfield = 't.datec', $lim
 					$line->type_label = $label_type;
 
 					$this->category_code = $obj->category_code;
-					$label_category = ($langs->trans("TicketCategoryShort".$obj->category_code) != "TicketCategoryShort".$obj->category_code ? $langs->trans("TicketCategoryShort".$obj->category_code) : ($obj->category_label != '-' ? $obj->category_label : ''));
+					$label_category = ($langs->trans("TicketCategoryShort".$obj->category_code) != "TicketCategoryShort".$obj->category_code ? $langs->trans("TicketCategoryShort".$obj->category_code) : (isset($obj->category_label) && $obj->category_label != '-' ? $obj->category_label : ''));
 					$line->category_label = $label_category;
 
 					$this->severity_code = $obj->severity_code;
-					$label_severity = ($langs->trans("TicketSeverityShort".$obj->severity_code) != "TicketSeverityShort".$obj->severity_code ? $langs->trans("TicketSeverityShort".$obj->severity_code) : ($obj->severity_label != '-' ? $obj->severity_label : ''));
+					$label_severity = ($langs->trans("TicketSeverityShort".$obj->severity_code) != "TicketSeverityShort".$obj->severity_code ? $langs->trans("TicketSeverityShort".$obj->severity_code) : (isset($obj->severity_label) && $obj->severity_label != '-' ? $obj->severity_label : ''));
 					$line->severity_label = $label_severity;
 
 					$line->datec = $this->db->jdate($obj->datec);