diff --git a/calendar/inc/class.calendar_groupdav.inc.php b/calendar/inc/class.calendar_groupdav.inc.php
index c1a2289b39..658add7863 100644
--- a/calendar/inc/class.calendar_groupdav.inc.php
+++ b/calendar/inc/class.calendar_groupdav.inc.php
@@ -798,7 +798,7 @@ class calendar_groupdav extends groupdav_handler
 		$props[] = HTTP_WebDAV_Server::mkprop('supported-report-set',array(
 			HTTP_WebDAV_Server::mkprop('supported-report',array(
 				HTTP_WebDAV_Server::mkprop('report',
-					HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'calendar-multiget'))))));
+					HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'calendar-multiget',''))))));
 		$props[] = HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'supported-calendar-data',array(
 			HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'calendar-data', array('content-type' => 'text/calendar', 'version'=> '2.0')),
 			HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'calendar-data', array('content-type' => 'text/x-calendar', 'version'=> '1.0'))));
diff --git a/phpgwapi/inc/class.groupdav.inc.php b/phpgwapi/inc/class.groupdav.inc.php
index abbd6f2153..8b9ac0da03 100644
--- a/phpgwapi/inc/class.groupdav.inc.php
+++ b/phpgwapi/inc/class.groupdav.inc.php
@@ -296,7 +296,7 @@ class groupdav extends HTTP_WebDAV_Server
 							self::mkprop(groupdav::CALDAV,'calendar-home-set',array(
 								self::mkprop('href',$this->base_uri.$user_prefix))),
 							self::mkprop(groupdav::CARDDAV,'addressbook-home-set',array(
-								self::mkprop('href',$this->base_uri.'/'))),
+								self::mkprop('href',$this->base_uri.$user_prefix))),
 							self::mkprop('principal-URL',array(self::mkprop('href',$this->principalURL))),
 		            	),
 					);