diff --git a/spec/integ/crypto/crypto.spec.ts b/spec/integ/crypto/crypto.spec.ts
index 613769e4968..d72b3d6a262 100644
--- a/spec/integ/crypto/crypto.spec.ts
+++ b/spec/integ/crypto/crypto.spec.ts
@@ -91,7 +91,6 @@ import {
     OnlySignedDevicesIsolationMode,
 } from "../../../src/crypto-api";
 import { E2EKeyResponder } from "../../test-utils/E2EKeyResponder";
-import { IKeyBackup } from "../../../src/crypto/backup";
 import {
     createOlmAccount,
     createOlmSession,
@@ -106,6 +105,7 @@ import { ToDevicePayload } from "../../../src/models/ToDeviceMessage";
 import { AccountDataAccumulator } from "../../test-utils/AccountDataAccumulator";
 import { UNSIGNED_MEMBERSHIP_FIELD } from "../../../src/@types/event";
 import { KnownMembership } from "../../../src/@types/membership";
+import { KeyBackup } from "../../../src/rust-crypto/backup.ts";
 
 afterEach(() => {
     // reset fake-indexeddb after each test, to make sure we don't leak connections
@@ -3138,11 +3138,11 @@ describe.each(Object.entries(CRYPTO_BACKENDS))("crypto (%s)", (backend: string,
                 // Import a new key that should be uploaded
                 const newKey = testData.MEGOLM_SESSION_DATA;
 
-                const awaitKeyUploaded = new Promise<IKeyBackup>((resolve) => {
+                const awaitKeyUploaded = new Promise<KeyBackup>((resolve) => {
                     fetchMock.put(
                         "path:/_matrix/client/v3/room_keys/keys",
                         (url, request) => {
-                            const uploadPayload: IKeyBackup = JSON.parse(request.body?.toString() ?? "{}");
+                            const uploadPayload: KeyBackup = JSON.parse(request.body?.toString() ?? "{}");
                             resolve(uploadPayload);
                             return {
                                 status: 200,
diff --git a/spec/integ/crypto/megolm-backup.spec.ts b/spec/integ/crypto/megolm-backup.spec.ts
index bc36f940ffc..55cdd76b1f1 100644
--- a/spec/integ/crypto/megolm-backup.spec.ts
+++ b/spec/integ/crypto/megolm-backup.spec.ts
@@ -42,10 +42,10 @@ import {
 } from "../../test-utils/test-utils";
 import * as testData from "../../test-utils/test-data";
 import { KeyBackupInfo, KeyBackupSession } from "../../../src/crypto-api/keybackup";
-import { IKeyBackup } from "../../../src/crypto/backup";
 import { flushPromises } from "../../test-utils/flushPromises";
 import { defer, IDeferred } from "../../../src/utils";
 import { DecryptionFailureCode } from "../../../src/crypto-api";
+import { KeyBackup } from "../../../src/rust-crypto/backup.ts";
 
 const ROOM_ID = testData.TEST_ROOM_ID;
 
@@ -91,7 +91,7 @@ function mockUploadEmitter(
                     },
                 };
             }
-            const uploadPayload: IKeyBackup = JSON.parse(request.body?.toString() ?? "{}");
+            const uploadPayload: KeyBackup = JSON.parse(request.body?.toString() ?? "{}");
             let count = 0;
             for (const [roomId, value] of Object.entries(uploadPayload.rooms)) {
                 for (const sessionId of Object.keys(value.sessions)) {
diff --git a/src/rust-crypto/index.ts b/src/rust-crypto/index.ts
index 61f15a192a1..bf391bdca0d 100644
--- a/src/rust-crypto/index.ts
+++ b/src/rust-crypto/index.ts
@@ -20,7 +20,6 @@ import { StoreHandle } from "@matrix-org/matrix-sdk-crypto-wasm";
 import { RustCrypto } from "./rust-crypto.ts";
 import { IHttpOpts, MatrixHttpApi } from "../http-api/index.ts";
 import { ServerSideSecretStorage } from "../secret-storage.ts";
-import { ICryptoCallbacks } from "../crypto/index.ts";
 import { Logger } from "../logger.ts";
 import { CryptoStore, MigrationState } from "../crypto/store/base.ts";
 import {
@@ -28,6 +27,7 @@ import {
     migrateLegacyLocalTrustIfNeeded,
     migrateRoomSettingsFromLegacyCrypto,
 } from "./libolm_migration.ts";
+import { CryptoCallbacks } from "../crypto-api/index.ts";
 
 /**
  * Create a new `RustCrypto` implementation
@@ -55,7 +55,7 @@ export async function initRustCrypto(args: {
     secretStorage: ServerSideSecretStorage;
 
     /** Crypto callbacks provided by the application. */
-    cryptoCallbacks: ICryptoCallbacks;
+    cryptoCallbacks: CryptoCallbacks;
 
     /**
      * The prefix to use on the indexeddbs created by rust-crypto.
@@ -145,7 +145,7 @@ async function initOlmMachine(
     userId: string,
     deviceId: string,
     secretStorage: ServerSideSecretStorage,
-    cryptoCallbacks: ICryptoCallbacks,
+    cryptoCallbacks: CryptoCallbacks,
     storeHandle: StoreHandle,
     legacyCryptoStore?: CryptoStore,
 ): Promise<RustCrypto> {