diff --git a/mail/inc/class.mail_sieve.inc.php b/mail/inc/class.mail_sieve.inc.php
index 1fa9c4d6b2..0dc7f54d51 100644
--- a/mail/inc/class.mail_sieve.inc.php
+++ b/mail/inc/class.mail_sieve.inc.php
@@ -659,6 +659,11 @@ class mail_sieve
 			{
 				$sel_options['status'] += $ByDate;
 			}
+			if (!isset($GLOBALS['egw_info']['user']['apps']['admin']))
+			{
+				$content['is_not_admin_user'] = true;
+				$readonlys['set_as_default'] = true;
+			}
 			$content['msg'] = $msg;
 		}
 		else
diff --git a/mail/templates/default/sieve.vacation.xet b/mail/templates/default/sieve.vacation.xet
index 5565b01b3b..d86e59b167 100644
--- a/mail/templates/default/sieve.vacation.xet
+++ b/mail/templates/default/sieve.vacation.xet
@@ -50,7 +50,7 @@
 					</vbox>
 				</row>
 				<row>
-					<description value="Set it as default:"/>
+					<description value="Set it as default:" disabled="@is_not_admin_user"/>
 					<checkbox id="set_as_default"/>
 					<description value="Validate addresses on submit:"/>
 					<checkbox id="check_mail_sent_to"/>