diff --git a/htdocs/core/lib/security2.lib.php b/htdocs/core/lib/security2.lib.php
index ba9a477ebd7..2e178fbc250 100644
--- a/htdocs/core/lib/security2.lib.php
+++ b/htdocs/core/lib/security2.lib.php
@@ -184,7 +184,7 @@ if (!function_exists('dol_loginfunction'))
 		// Set cookie for timeout management
 		$prefix = dol_getprefix('');
 		$sessiontimeout = 'DOLSESSTIMEOUT_'.$prefix;
-		if (!empty($conf->global->MAIN_SESSION_TIMEOUT)) setcookie($sessiontimeout, $conf->global->MAIN_SESSION_TIMEOUT, 0, "/", null, false, true);
+		if (!empty($conf->global->MAIN_SESSION_TIMEOUT)) setcookie($sessiontimeout, $conf->global->MAIN_SESSION_TIMEOUT, 0, "/", null, (empty($dolibarr_main_force_https) ? false : true), true);
 
 		if (GETPOST('urlfrom', 'alpha')) $_SESSION["urlfrom"] = GETPOST('urlfrom', 'alpha');
 		else unset($_SESSION["urlfrom"]);