diff --git a/src/matrix/storage/idb/Store.js b/src/matrix/storage/idb/Store.js
index 2cafe500..91617b5f 100644
--- a/src/matrix/storage/idb/Store.js
+++ b/src/matrix/storage/idb/Store.js
@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import {QueryTarget} from "./QueryTarget.js";
-import {IDBRequestAttemptError} from "./error.js";
+import {IDBRequestAttemptError} from "./error";
 
 const LOG_REQUESTS = false;
 
diff --git a/src/matrix/storage/idb/error.js b/src/matrix/storage/idb/error.ts
similarity index 100%
rename from src/matrix/storage/idb/error.js
rename to src/matrix/storage/idb/error.ts
diff --git a/src/matrix/storage/idb/utils.ts b/src/matrix/storage/idb/utils.ts
index b0097ce7..8e63d1fa 100644
--- a/src/matrix/storage/idb/utils.ts
+++ b/src/matrix/storage/idb/utils.ts
@@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { IDBRequestError } from "./error.js";
+import { IDBRequestError } from "./error";
 import { StorageError } from "../common";
 
 let needsSyncPromise = false;