diff --git a/htdocs/core/lib/date.lib.php b/htdocs/core/lib/date.lib.php
index 518ccca4749..181ce34976d 100644
--- a/htdocs/core/lib/date.lib.php
+++ b/htdocs/core/lib/date.lib.php
@@ -115,7 +115,7 @@ function getServerTimeZoneInt($refgmtdate = 'now')
 /**
  *  Add a delay to a date
  *
- *  @param      int|string	$time               Date timestamp (or string with format YYYY-MM-DD)
+ *  @param      int			$time               Date timestamp
  *  @param      float		$duration_value     Value of delay to add
  *  @param      string		$duration_unit      Unit of added delay (d, m, y, w, h, i)
  *  @param      int<0,1>    $ruleforendofmonth  Change the behavior of PHP over data-interval, 0 or 1