diff --git a/src/matrix/net/HomeServerApi.js b/src/matrix/net/HomeServerApi.js
index 30d036cb..2d5703dd 100644
--- a/src/matrix/net/HomeServerApi.js
+++ b/src/matrix/net/HomeServerApi.js
@@ -135,7 +135,7 @@ export class HomeServerApi {
             return this._post(`/rooms/${encodeURIComponent(roomId)}/receipt/${encodeURIComponent(receiptType)}/${encodeURIComponent(eventId)}`,
                 {}, {}, options);
         }
-        return () => {};
+        return Promise.resolve(() => {});
     }
 
     passwordLogin(username, password, initialDeviceDisplayName, options = null) {