diff --git a/htdocs/core/class/commondocgenerator.class.php b/htdocs/core/class/commondocgenerator.class.php
index dda475e8c89..9d18fccf423 100644
--- a/htdocs/core/class/commondocgenerator.class.php
+++ b/htdocs/core/class/commondocgenerator.class.php
@@ -1615,7 +1615,7 @@ abstract class CommonDocGenerator
 		$extrafields = $this->extrafieldsCache;
 
 
-		if (!empty($extrafields->attributes[$object->table_element]) && is_array($extrafields->attributes[$object->table_element]['label'])) {
+		if (!empty($extrafields->attributes[$object->table_element]) && is_array($extrafields->attributes[$object->table_element]) && array_key_exists('label', $extrafields->attributes[$object->table_element]) && is_array($extrafields->attributes[$object->table_element]['label'])) {
 			foreach ($extrafields->attributes[$object->table_element]['label'] as $key => $label) {
 				// Dont display separator yet even is set to be displayed (not compatible yet)
 				if ($extrafields->attributes[$object->table_element]['type'][$key] == 'separate') {