diff --git a/htdocs/core/modules/syslog/logHandler.php b/htdocs/core/modules/syslog/logHandler.php
index 1672a683cb1..e7ec4dbc567 100644
--- a/htdocs/core/modules/syslog/logHandler.php
+++ b/htdocs/core/modules/syslog/logHandler.php
@@ -87,11 +87,11 @@ class LogHandler
 	 * It will be called after setting the configuration.
 	 * The function returns an array with error messages
 	 *
-	 * @return array
+	 * @return bool
 	 */
 	public function checkConfiguration()
 	{
-		return array();
+		return true;
 	}
 
 	/**
diff --git a/htdocs/core/modules/syslog/logHandlerInterface.php b/htdocs/core/modules/syslog/logHandlerInterface.php
index 15ab436f4fa..2613d50f755 100644
--- a/htdocs/core/modules/syslog/logHandlerInterface.php
+++ b/htdocs/core/modules/syslog/logHandlerInterface.php
@@ -1,4 +1,6 @@
 <?php
+/* Copyright (C) 2024       Frédéric France             <frederic.france@free.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
@@ -79,7 +81,7 @@ interface LogHandlerInterface
 	/**
 	 * 	Output log content
 	 *
-	 *	@param	string	$content	Content to log
+	 *	@param	array	$content	Content to log
 	 * 	@return	void
 	 */
 	public function export($content);
diff --git a/htdocs/core/modules/syslog/mod_syslog_syslog.php b/htdocs/core/modules/syslog/mod_syslog_syslog.php
index b2ccf4f997e..8d1457fa2ec 100644
--- a/htdocs/core/modules/syslog/mod_syslog_syslog.php
+++ b/htdocs/core/modules/syslog/mod_syslog_syslog.php
@@ -83,7 +83,7 @@ class mod_syslog_syslog extends LogHandler implements LogHandlerInterface
 	 */
 	public function checkConfiguration()
 	{
-		global $conf, $langs;
+		global $langs;
 
 		$facility = constant(getDolGlobalString('SYSLOG_FACILITY'));