diff --git a/application/cmdbabstract.class.inc.php b/application/cmdbabstract.class.inc.php
index bc0fcbb4f..f5a97f920 100644
--- a/application/cmdbabstract.class.inc.php
+++ b/application/cmdbabstract.class.inc.php
@@ -2966,7 +2966,6 @@ EOF
 				$data = $oDoc->GetData();
 				switch ($oDoc->GetMimeType())
 				{
-					case 'text/html':
 					case 'text/xml':
 						$oPage->add("<iframe id='preview_$sAttCode' src=\"".utils::GetAbsoluteUrlAppRoot()."pages/ajax.render.php?operation=display_document&class=$sClass&id=$Id&field=$sAttCode\" width=\"100%\" height=\"400\">Loading...</iframe>\n");
 						break;