diff --git a/api/src/Mail/Imap.php b/api/src/Mail/Imap.php
index 5e78e402e6..1a6e6ee19d 100644
--- a/api/src/Mail/Imap.php
+++ b/api/src/Mail/Imap.php
@@ -1401,10 +1401,9 @@ class Imap extends Horde_Imap_Client_Socket implements Imap\PushIface
 	 * @param int|string $_euser numeric account_id or imap username
 	 * @param array $_vacation
 	 * @param string $_scriptName =null
-	 * @param string|null& $vacation_rule=null on return Sieve vacation rule
 	 * @return boolean
 	 */
-	public function setVacationUser($_euser, array $_vacation, $_scriptName=null, string &$vacation_rule=null)
+	public function setVacationUser($_euser, array $_vacation, $_scriptName=null)
 	{
 		if ($this->debug) error_log(__METHOD__.' User:'.array2string($_euser).' Scriptname:'.array2string($_scriptName).' VacationMessage:'.array2string($_vacation));
 
@@ -1419,9 +1418,7 @@ class Imap extends Horde_Imap_Client_Socket implements Imap\PushIface
 			$this->scriptName =& $this->sieve->scriptName;
 			$this->error =& $this->sieve->error;
 		}
-		$ret = $this->setVacation($_vacation, $_scriptName, $vacation_rule);
-
-		return $ret;
+		return $this->setVacation($_vacation, $_scriptName);
 	}
 
 	/**