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-rw-r--r--apps/calendar/export.php4
1 files changed, 2 insertions, 2 deletions
diff --git a/apps/calendar/export.php b/apps/calendar/export.php
index b3e5ecd6834..3e93a1ad618 100644
--- a/apps/calendar/export.php
+++ b/apps/calendar/export.php
@@ -9,8 +9,8 @@
require_once ("../../lib/base.php");
OC_Util::checkLoggedIn();
OC_Util::checkAppEnabled('calendar');
-$cal = $_GET["calid"];
-$event = $_GET["eventid"];
+$cal = isset($_GET["calid"]) ? $_GET["calid"] : NULL;
+$event = isset($_GET["eventid"]) ? $_GET["eventid"] : NULL;
if(isset($cal)){
$calendar = OC_Calendar_Calendar::findCalendar($cal);
if($calendar["userid"] != OC_User::getUser()){