diff --git a/src/matrix/storage/idb/StorageFactory.js b/src/matrix/storage/idb/StorageFactory.js
index b8d13acc..fa5bbabc 100644
--- a/src/matrix/storage/idb/StorageFactory.js
+++ b/src/matrix/storage/idb/StorageFactory.js
@@ -18,7 +18,7 @@ import {Storage} from "./Storage";
 import { openDatabase, reqAsPromise } from "./utils";
 import { exportSession, importSession } from "./export";
 import { schema } from "./schema";
-import { detectWebkitEarlyCloseTxnBug } from "./quirks.js";
+import { detectWebkitEarlyCloseTxnBug } from "./quirks";
 
 const sessionName = sessionId => `hydrogen_session_${sessionId}`;
 const openDatabaseWithSessionId = function(sessionId, idbFactory) {
diff --git a/src/matrix/storage/idb/quirks.js b/src/matrix/storage/idb/quirks.ts
similarity index 100%
rename from src/matrix/storage/idb/quirks.js
rename to src/matrix/storage/idb/quirks.ts