diff --git a/apps/dav/lib/CalDAV/Calendar.php b/apps/dav/lib/CalDAV/Calendar.php
index f5607c65272..6a811149e26 100644
--- a/apps/dav/lib/CalDAV/Calendar.php
+++ b/apps/dav/lib/CalDAV/Calendar.php
@@ -24,14 +24,13 @@
 namespace OCA\DAV\CalDAV;
 
 use OCA\DAV\DAV\Sharing\IShareable;
-use Sabre\CalDAV\IShareableCalendar;
 use OCP\IL10N;
 use Sabre\CalDAV\Backend\BackendInterface;
 use Sabre\DAV\Exception\Forbidden;
 use Sabre\DAV\Exception\NotFound;
 use Sabre\DAV\PropPatch;
 
-class Calendar extends \Sabre\CalDAV\Calendar implements IShareable, IShareableCalendar {
+class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 
 	public function __construct(BackendInterface $caldavBackend, $calendarInfo, IL10N $l10n) {
 		parent::__construct($caldavBackend, $calendarInfo);