diff --git a/htdocs/admin/syslog.php b/htdocs/admin/syslog.php
index dfdc53e0f18..10b3d1bd47b 100644
--- a/htdocs/admin/syslog.php
+++ b/htdocs/admin/syslog.php
@@ -180,10 +180,10 @@ if (!$defaultsyslogfacility) {
 if (!$defaultsyslogfile) {
 	$defaultsyslogfile = 'dolibarr.log';
 }
-
-if ($conf->global->MAIN_MODULE_MULTICOMPANY && $user->entity) {
+$optionmc = '';
+if (!empty($conf->global->MAIN_MODULE_MULTICOMPANY) && $user->entity) {
 	print '<div class="error">'.$langs->trans("ContactSuperAdminForChange").'</div>';
-	$option = 'disabled';
+	$optionmc = 'disabled';
 }
 
 
@@ -199,7 +199,7 @@ print '<input type="hidden" name="action" value="set">';
 print '<table class="noborder centpercent">';
 print '<tr class="liste_titre">';
 print '<td>'.$langs->trans("Type").'</td><td>'.$langs->trans("Value").'</td>';
-print '<td class="right" colspan="2"><input type="submit" class="button" '.$option.' value="'.$langs->trans("Modify").'"></td>';
+print '<td class="right" colspan="2"><input type="submit" class="button" '.$optionmc.' value="'.$langs->trans("Modify").'"></td>';
 print "</tr>\n";
 
 foreach ($syslogModules as $moduleName) {
@@ -279,11 +279,11 @@ print '<input type="hidden" name="action" value="setlevel">';
 print '<table class="noborder centpercent">';
 print '<tr class="liste_titre">';
 print '<td>'.$langs->trans("Parameter").'</td><td>'.$langs->trans("Value").'</td>';
-print '<td class="right"><input type="submit" class="button" '.$option.' value="'.$langs->trans("Modify").'"></td>';
+print '<td class="right"><input type="submit" class="button" '.$optionmc.' value="'.$langs->trans("Modify").'"></td>';
 print "</tr>\n";
 
 print '<tr class="oddeven"><td width="140">'.$langs->trans("SyslogLevel").'</td>';
-print '<td colspan="2"><select class="flat" name="level" '.$option.'>';
+print '<td colspan="2"><select class="flat" name="level" '.$optionmc.'>';
 print '<option value="'.LOG_EMERG.'" '.($conf->global->SYSLOG_LEVEL == LOG_EMERG ? 'SELECTED' : '').'>LOG_EMERG ('.LOG_EMERG.')</option>';
 print '<option value="'.LOG_ALERT.'" '.($conf->global->SYSLOG_LEVEL == LOG_ALERT ? 'SELECTED' : '').'>LOG_ALERT ('.LOG_ALERT.')</option>';
 print '<option value="'.LOG_CRIT.'" '.($conf->global->SYSLOG_LEVEL == LOG_CRIT ? 'SELECTED' : '').'>LOG_CRIT ('.LOG_CRIT.')</option>';
diff --git a/htdocs/admin/user.php b/htdocs/admin/user.php
index 6d8cfe21f00..da3a1913d64 100644
--- a/htdocs/admin/user.php
+++ b/htdocs/admin/user.php
@@ -268,7 +268,7 @@ foreach ($dirmodels as $reldir) {
 
 								// Defaut
 								print '<td class="center">';
-								if ($conf->global->USER_ADDON_PDF == $name) {
+								if (getDolGlobalString('USER_ADDON_PDF_ODT') == $name) {
 									print img_picto($langs->trans("Default"), 'on');
 								} else {
 									print '<a href="'.$_SERVER["PHP_SELF"].'?action=setdoc&amp;token='.newToken().'&amp;value='.$name.'&amp;scandir='.$module->scandir.'&amp;label='.urlencode($module->name).'" alt="'.$langs->trans("Default").'">'.img_picto($langs->trans("Disabled"), 'off').'</a>';
diff --git a/htdocs/core/modules/user/doc/doc_generic_user_odt.modules.php b/htdocs/core/modules/user/doc/doc_generic_user_odt.modules.php
index b0d98a525df..7ca8d29c380 100644
--- a/htdocs/core/modules/user/doc/doc_generic_user_odt.modules.php
+++ b/htdocs/core/modules/user/doc/doc_generic_user_odt.modules.php
@@ -1,7 +1,7 @@
 <?php
 /* Copyright (C) 2010-2012 	Laurent Destailleur <eldy@users.sourceforge.net>
  * Copyright (C) 2012		Juanjo Menent		<jmenent@2byte.es>
- * Copyright (C) 2018-2020  Frédéric France         <frederic.france@netlogic.fr>
+ * Copyright (C) 2018-2021  Frédéric France         <frederic.france@netlogic.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -120,7 +120,7 @@ class doc_generic_user_odt extends ModelePDFUser
 		$texte .= '<input type="hidden" name="token" value="'.newToken().'">';
 		$texte .= '<input type="hidden" name="action" value="setModuleOptions">';
 		$texte .= '<input type="hidden" name="param1" value="USER_ADDON_PDF_ODT_PATH">';
-		if ($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT > 0) {
+		if (!empty($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT)) {
 			$texte .= '<input type="hidden" name="param2" value="USER_ADDON_PDF_ODT_DEFAULT">';
 			$texte .= '<input type="hidden" name="param3" value="USER_ADDON_PDF_ODT_TOBILL">';
 			$texte .= '<input type="hidden" name="param4" value="USER_ADDON_PDF_ODT_CLOSED">';
@@ -166,7 +166,7 @@ class doc_generic_user_odt extends ModelePDFUser
 		if (count($listofdir)) {
 			$texte .= $langs->trans("NumberOfModelFilesFound").': <b>'.count($listoffiles).'</b>';
 
-			if ($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT > 0) {
+			if (!empty($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT)) {
 				// Model for creation
 				$list = ModelePDFUser::liste_modeles($this->db);
 				$texte .= '<table width="50%;">';