diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index c5bf06cb31d..9f467012d5d 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -466,7 +466,7 @@ if (GETPOST('textbrowser', 'int') || (!empty($conf->browser->name) && $conf->bro
 
 // Force HTTPS if required ($conf->file->main_force_https is 0/1 or 'https dolibarr root url')
 // $_SERVER["HTTPS"] is 'on' when link is https, otherwise $_SERVER["HTTPS"] is empty or 'off'
-if (!empty($conf->file->main_force_https) && isHTTPS() && !defined('NOHTTPSREDIRECT')) {
+if (!empty($conf->file->main_force_https) && !isHTTPS() && !defined('NOHTTPSREDIRECT')) {
 	$newurl = '';
 	if (is_numeric($conf->file->main_force_https)) {
 		if ($conf->file->main_force_https == '1' && !empty($_SERVER["SCRIPT_URI"])) {	// If SCRIPT_URI supported by server