diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 87f5b0a771f..75729cbb4f9 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -995,10 +995,11 @@ function dol_strtoupper($utf8_string)
  *												On Linux   LOG_ERR=3, LOG_WARNING=4, LOG_INFO=6, LOG_DEBUG=7
  *  @param	int			$ident					1=Increase ident of 1, -1=Decrease ident of 1
  *  @param	string		$suffixinfilename		When output is a file, append this suffix into default log filename.
- *  @param	string		$restricttologhandler	Output log only for this log handler
+ *  @param	string		$restricttologhandler	Force output of log only to this log handler
+ *  @param	array|null	$logcontext				If defined, an array with extra informations (can be used by some log handlers)
  *  @return	void
  */
-function dol_syslog($message, $level = LOG_INFO, $ident = 0, $suffixinfilename = '', $restricttologhandler = '')
+function dol_syslog($message, $level = LOG_INFO, $ident = 0, $suffixinfilename = '', $restricttologhandler = '', $logcontext = null)
 {
     global $conf, $user, $debugbar;