diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index d02633c2d04..4cb9f65f3b4 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -997,7 +997,7 @@ function dol_getdate($timestamp,$fast=false)
  *	@param	int			$month			Month (1 to 12)
  *	@param	int			$day			Day (1 to 31)
  *	@param	int			$year			Year
- *	@param	mixed		$gm				True or 1=Input informations are GMT values, False or 0 or 'server' = local to server TZ, 'user' = local to user TZ
+ *	@param	mixed		$gm				True or 1 or 'gmt'=Input informations are GMT values, False or 0 or 'server' = local to server TZ, 'user' = local to user TZ
  *	@param	int			$check			0=No check on parameters (Can use day 32, etc...)
  *	@return	int							Date as a timestamp, '' if error
  * 	@see 								dol_print_date, dol_stringtotime, dol_getdate