diff --git a/apps/dav/lib/systemtag/systemtagsrelationscollection.php b/apps/dav/lib/systemtag/systemtagsrelationscollection.php
index e291da705e..223aaac93d 100644
--- a/apps/dav/lib/systemtag/systemtagsrelationscollection.php
+++ b/apps/dav/lib/systemtag/systemtagsrelationscollection.php
@@ -26,6 +26,8 @@ use OCP\SystemTag\ISystemTagManager;
 use OCP\SystemTag\ISystemTagObjectMapper;
 use Sabre\DAV\Exception\Forbidden;
 use Sabre\DAV\SimpleCollection;
+use OCP\IUserSession;
+use OCP\IGroupManager;
 
 class SystemTagsRelationsCollection extends SimpleCollection {