diff --git a/apps/dav/lib/SystemTag/SystemTagsRelationsCollection.php b/apps/dav/lib/SystemTag/SystemTagsRelationsCollection.php
index b9fd949d466..77e904954b6 100644
--- a/apps/dav/lib/SystemTag/SystemTagsRelationsCollection.php
+++ b/apps/dav/lib/SystemTag/SystemTagsRelationsCollection.php
@@ -26,6 +26,7 @@
  */
 namespace OCA\DAV\SystemTag;
 
+use OCP\Constants;
 use OCP\IGroupManager;
 use OCP\IUserSession;
 use OCP\SystemTag\ISystemTagManager;