diff --git a/htdocs/core/lib/security.lib.php b/htdocs/core/lib/security.lib.php
index 80150a5c53e..1b8e91f78e5 100644
--- a/htdocs/core/lib/security.lib.php
+++ b/htdocs/core/lib/security.lib.php
@@ -909,9 +909,11 @@ function accessforbidden($message = '', $printheader = 1, $printfooter = 1, $sho
 		$reshook = $hookmanager->executeHooks('getAccessForbiddenMessage', $parameters, $object, $action); // Note that $action and $object may have been modified by some hooks
 		print $hookmanager->resPrint;
 		if (empty($reshook)) {
+			$langs->loadLangs(array("errors"));
 			if ($user->login) {
 				print $langs->trans("CurrentLogin").': <span class="error">'.$user->login.'</span><br>';
 				print $langs->trans("ErrorForbidden2", $langs->transnoentitiesnoconv("Home"), $langs->transnoentitiesnoconv("Users"));
+				print $langs->trans("ErrorForbidden4");
 			} else {
 				print $langs->trans("ErrorForbidden3");
 			}
diff --git a/htdocs/langs/en_US/errors.lang b/htdocs/langs/en_US/errors.lang
index 0c0c3c7699d..cb0d4f1def0 100644
--- a/htdocs/langs/en_US/errors.lang
+++ b/htdocs/langs/en_US/errors.lang
@@ -111,6 +111,7 @@ ErrorFailedToLoadRSSFile=Fails to get RSS feed. Try to add constant MAIN_SIMPLEX
 ErrorForbidden=Access denied.<br>You try to access to a page, area or feature of a disabled module or without being in an authenticated session or that is not allowed to your user.
 ErrorForbidden2=Permission for this login can be defined by your Dolibarr administrator from menu %s->%s.
 ErrorForbidden3=It seems that Dolibarr is not used through an authenticated session. Take a look at Dolibarr setup documentation to know how to manage authentications (htaccess, mod_auth or other...).
+ErrorForbidden4=Note: clear your browser cookies to destroy existing sessions for this login.
 ErrorNoImagickReadimage=Class Imagick is not found in this PHP. No preview can be available. Administrators can disable this tab from menu Setup - Display.
 ErrorRecordAlreadyExists=Record already exists
 ErrorLabelAlreadyExists=This label already exists
diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 05ec2b969b3..3e06d0a2a2d 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -1166,7 +1166,7 @@ if (!defined('NOLOGIN')) {
 	// Check if user is active
 	if ($user->statut < 1) {
 		// If not active, we refuse the user
-		$langs->load("other");
+		$langs->loadLangs(array("errors", "other"));
 		dol_syslog("Authentication KO as login is disabled", LOG_NOTICE);
 		accessforbidden($langs->trans("ErrorLoginDisabled"));
 		exit;