diff --git a/htdocs/core/ajax/ajaxdirpreview.php b/htdocs/core/ajax/ajaxdirpreview.php
index bb6a8de30d4..83227b00e51 100644
--- a/htdocs/core/ajax/ajaxdirpreview.php
+++ b/htdocs/core/ajax/ajaxdirpreview.php
@@ -355,7 +355,7 @@ if ($useajax || $action == 'delete')
 	$section_id = $section;
 
 	require_once DOL_DOCUMENT_ROOT.'/core/class/html.form.class.php';
-	$useglobalvars = 1;
+
 	$form = new Form($db);
 	$formquestion['urlfile'] = array('type'=>'hidden', 'value'=>$urlfile, 'name'=>'urlfile'); // We must always put field, even if empty because it is filled by javascript later
 	$formquestion['section'] = array('type'=>'hidden', 'value'=>$section, 'name'=>'section'); // We must always put field, even if empty because it is filled by javascript later
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index f2b11938ca2..30519077c9e 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -4207,7 +4207,6 @@ class Form
     public function formconfirm($page, $title, $question, $action, $formquestion = '', $selectedchoice = '', $useajax = 0, $height = 0, $width = 500, $disableformtag = 0)
 	{
 		global $langs, $conf;
-		global $useglobalvars;
 
 		$more = '<!-- formconfirm -->';
 		$formconfirm = '';
@@ -4355,7 +4354,7 @@ class Form
 					if (isset($input['inputko']) && $input['inputko'] == 1) array_push($inputko, $input['name']);
 				}
 			}
-			// Show JQuery confirm box. Note that global var $useglobalvars is used inside this template
+			// Show JQuery confirm box.
 			$formconfirm .= '<div id="'.$dialogconfirm.'" title="'.dol_escape_htmltag($title).'" style="display: none;">';
 			if (!empty($formquestion['text'])) {
 				$formconfirm .= '<div class="confirmtext">'.$formquestion['text'].'</div>'."\n";