diff --git a/src/matrix/storage/idb/StorageFactory.js b/src/matrix/storage/idb/StorageFactory.js
index 8f6e5d69..0226f395 100644
--- a/src/matrix/storage/idb/StorageFactory.js
+++ b/src/matrix/storage/idb/StorageFactory.js
@@ -30,7 +30,7 @@ export class StorageFactory {
 
     delete(sessionId) {
         const databaseName = sessionName(sessionId);
-        const req = window.indexedDB.deleteDatabase(databaseName);
+        const req = indexedDB.deleteDatabase(databaseName);
         return reqAsPromise(req);
     }