diff --git a/apps/files/js/detailtabview.js b/apps/files/js/detailtabview.js
index 67f8b535abd..b0e170bc4e7 100644
--- a/apps/files/js/detailtabview.js
+++ b/apps/files/js/detailtabview.js
@@ -88,6 +88,8 @@
 	});
 	DetailTabView._TAB_COUNT = 0;
 
+	OCA.Files = OCA.Files || {};
+
 	OCA.Files.DetailTabView = DetailTabView;
 })();