diff --git a/application/cmdbabstract.class.inc.php b/application/cmdbabstract.class.inc.php
index e08ec23db..5756770cf 100644
--- a/application/cmdbabstract.class.inc.php
+++ b/application/cmdbabstract.class.inc.php
@@ -3677,7 +3677,7 @@ HTML;
 			if ($oAttDef->GetEditClass() == 'Document') {
 				/** @var \ormDocument $oDocument */
 				$oDocument = $this->Get($sAttCode);
-				if (!$oDocument->IsEmpty()) {
+				if (is_object($oDocument) && !$oDocument->IsEmpty())
 					$sFieldAsHtml = $this->GetAsHTML($sAttCode);
 
 					$sDisplayLabel = Dict::S('UI:OpenDocumentInNewWindow_');