diff --git a/addressbook/inc/class.addressbook_groupdav.inc.php b/addressbook/inc/class.addressbook_groupdav.inc.php
index 443cc2a203..d4b605d3cc 100644
--- a/addressbook/inc/class.addressbook_groupdav.inc.php
+++ b/addressbook/inc/class.addressbook_groupdav.inc.php
@@ -393,11 +393,11 @@ class addressbook_groupdav extends groupdav_handler
 		
 		if (empty($result))
 		{
-			$ctag = $result[0]['contact_modified'];
+			$ctag = 0;
 		}
 		else
 		{
-			$ctag = time();
+			$ctag = $result[0]['contact_modified'];
 		}
 				
 		return 'EGw-'.$ctag.'-wGE';
diff --git a/infolog/inc/class.infolog_groupdav.inc.php b/infolog/inc/class.infolog_groupdav.inc.php
index 6d61240b10..1b49ad1c64 100644
--- a/infolog/inc/class.infolog_groupdav.inc.php
+++ b/infolog/inc/class.infolog_groupdav.inc.php
@@ -513,7 +513,7 @@ class infolog_groupdav extends groupdav_handler
 
 		$result =& $this->bo->search($query);
 		
-		if (empty($result)) return 'EGw-'.time().'-wGE';
+		if (empty($result)) return 'EGw-0-wGE';
 
 		$entry = array_shift($result);