diff --git a/mail/inc/class.mail_sieve.inc.php b/mail/inc/class.mail_sieve.inc.php
index dac08bf07b..6cfecd1d1d 100644
--- a/mail/inc/class.mail_sieve.inc.php
+++ b/mail/inc/class.mail_sieve.inc.php
@@ -621,9 +621,9 @@ class mail_sieve
 										self::setAsyncJob($newVacation);
 									}
 									//Reset vacationNotice cache which is used in mail_ui get_rows
-									$cachedVacations = egw_cache::getCache(egw_cache::INSTANCE, 'email', 'vacationNotice'+$GLOBALS['egw_info']['user']['account_lid']);
+									$cachedVacations = egw_cache::getCache(egw_cache::INSTANCE, 'email', 'vacationNotice'.$GLOBALS['egw_info']['user']['account_lid']);
 									$cachedVacations = array($icServer->acc_id => $newVacation) + (array)$cachedVacations;
-									egw_cache::setCache(egw_cache::INSTANCE,'email', 'vacationNotice'+$GLOBALS['egw_info']['user']['account_lid'], $cachedVacations);
+									egw_cache::setCache(egw_cache::INSTANCE,'email', 'vacationNotice'.$GLOBALS['egw_info']['user']['account_lid'], $cachedVacations);
 									
 									$msg = lang('Vacation notice sucessfully updated.');
 								}
diff --git a/mail/inc/class.mail_ui.inc.php b/mail/inc/class.mail_ui.inc.php
index 00872e6e4c..1bedd3821b 100644
--- a/mail/inc/class.mail_ui.inc.php
+++ b/mail/inc/class.mail_ui.inc.php
@@ -2290,7 +2290,7 @@ class mail_ui
 
 				$cachedVacations = array($sieveServer->acc_id => $vacation) + (array)$cachedVacations;
 				// Set vacation to the instance cache for particular account with expiration of one day
-				egw_cache::setCache(egw_cache::INSTANCE, 'email', 'vacationNotice'+$GLOBALS['egw_info']['user']['account_lid'], $cachedVacations, 60*60*24);
+				egw_cache::setCache(egw_cache::INSTANCE, 'email', 'vacationNotice'.$GLOBALS['egw_info']['user']['account_lid'], $cachedVacations, 60*60*24);
 			}
 			catch (PEAR_Exception $ex)
 			{
@@ -3917,7 +3917,7 @@ class mail_ui
 	public static function ajax_refreshVacationNotice($icServerID=null)
 	{
 		//Get vacation from cache if it's available
-		$cachedVacations = egw_cache::getCache(egw_cache::INSTANCE, 'email', 'vacationNotice'+$GLOBALS['egw_info']['user']['account_lid']);
+		$cachedVacations = egw_cache::getCache(egw_cache::INSTANCE, 'email', 'vacationNotice'.$GLOBALS['egw_info']['user']['account_lid']);
 		$vacation = $cachedVacations[$icServerID];
 
 		if (!$vacation)