diff --git a/spec/unit/rust-crypto/backup.spec.ts b/spec/unit/rust-crypto/backup.spec.ts
index 4b96c74f7c..ab5b740ee6 100644
--- a/spec/unit/rust-crypto/backup.spec.ts
+++ b/spec/unit/rust-crypto/backup.spec.ts
@@ -3,13 +3,11 @@ import fetchMock from "fetch-mock-jest";
 import * as RustSdkCryptoJs from "@matrix-org/matrix-sdk-crypto-wasm";
 
 import { HttpApiEvent, HttpApiEventHandlerMap, MatrixHttpApi, TypedEventEmitter } from "../../../src";
-import { CryptoEvent } from "../../../src/crypto-api/index.ts";
+import { CryptoEvent, KeyBackupSession } from "../../../src/crypto-api/index.ts";
 import { OutgoingRequestProcessor } from "../../../src/rust-crypto/OutgoingRequestProcessor";
 import * as testData from "../../test-utils/test-data";
 import * as TestData from "../../test-utils/test-data";
-import { IKeyBackup } from "../../../src/crypto/backup";
-import { IKeyBackupSession } from "../../../src/crypto/keybackup";
-import { RustBackupManager } from "../../../src/rust-crypto/backup";
+import { RustBackupManager, KeyBackup } from "../../../src/rust-crypto/backup";
 
 describe("Upload keys to backup", () => {
     /** The backup manager under test */
@@ -27,7 +25,7 @@ describe("Upload keys to backup", () => {
 
     let idGenerator = 0;
     function mockBackupRequest(keyCount: number): RustSdkCryptoJs.KeysBackupRequest {
-        const requestBody: IKeyBackup = {
+        const requestBody: KeyBackup = {
             rooms: {
                 "!room1:server": {
                     sessions: {},
@@ -35,7 +33,7 @@ describe("Upload keys to backup", () => {
             },
         };
         for (let i = 0; i < keyCount; i++) {
-            requestBody.rooms["!room1:server"].sessions["session" + i] = {} as IKeyBackupSession;
+            requestBody.rooms["!room1:server"].sessions["session" + i] = {} as KeyBackupSession;
         }
         return {
             id: "id" + idGenerator++,
diff --git a/src/rust-crypto/backup.ts b/src/rust-crypto/backup.ts
index d4a91bd0fa..63d1afdb02 100644
--- a/src/rust-crypto/backup.ts
+++ b/src/rust-crypto/backup.ts
@@ -24,6 +24,7 @@ import {
     KeyBackupInfo,
     KeyBackupSession,
     Curve25519SessionData,
+    KeyBackupRoomSessions,
 } from "../crypto-api/keybackup.ts";
 import { logger } from "../logger.ts";
 import { ClientPrefix, IHttpOpts, MatrixError, MatrixHttpApi, Method } from "../http-api/index.ts";
@@ -34,8 +35,6 @@ import { OutgoingRequestProcessor } from "./OutgoingRequestProcessor.ts";
 import { sleep } from "../utils.ts";
 import { BackupDecryptor } from "../common-crypto/CryptoBackend.ts";
 import { ImportRoomKeyProgressData, ImportRoomKeysOpts, CryptoEvent } from "../crypto-api/index.ts";
-import { IKeyBackupInfo } from "../crypto/keybackup.ts";
-import { IKeyBackup } from "../crypto/backup.ts";
 import { AESEncryptedSecretStoragePayload } from "../@types/AESEncryptedSecretStoragePayload.ts";
 
 /** Authentification of the backup info, depends on algorithm */
@@ -488,7 +487,7 @@ export class RustBackupManager extends TypedEventEmitter<RustBackupCryptoEvents,
      * @returns The number of keys in the backup request.
      */
     private keysCountInBatch(batch: RustSdkCryptoJs.KeysBackupRequest): number {
-        const parsedBody: IKeyBackup = JSON.parse(batch.body);
+        const parsedBody: KeyBackup = JSON.parse(batch.body);
         let count = 0;
         for (const { sessions } of Object.values(parsedBody.rooms)) {
             count += Object.keys(sessions).length;
@@ -653,7 +652,7 @@ export class RustBackupDecryptor implements BackupDecryptor {
 
 export async function requestKeyBackupVersion(
     http: MatrixHttpApi<IHttpOpts & { onlyData: true }>,
-): Promise<IKeyBackupInfo | null> {
+): Promise<KeyBackupInfo | null> {
     try {
         return await http.authedRequest<KeyBackupInfo>(Method.Get, "/room_keys/version", undefined, undefined, {
             prefix: ClientPrefix.V3,
@@ -679,3 +678,11 @@ export type RustBackupCryptoEventMap = {
     [CryptoEvent.KeyBackupFailed]: (errCode: string) => void;
     [CryptoEvent.KeyBackupDecryptionKeyCached]: (version: string) => void;
 };
+
+/**
+ * Response from GET `/room_keys/keys` endpoint.
+ * See https://spec.matrix.org/latest/client-server-api/#get_matrixclientv3room_keyskeys
+ */
+export interface KeyBackup {
+    rooms: Record<string, { sessions: KeyBackupRoomSessions }>;
+}