diff --git a/src/matrix/ssss/common.ts b/src/matrix/ssss/common.ts
index b7c06192..2bb5e8b5 100644
--- a/src/matrix/ssss/common.ts
+++ b/src/matrix/ssss/common.ts
@@ -16,7 +16,7 @@ limitations under the License.
 
 import type {Platform} from "../../platform/web/Platform.js";
 
-export interface IKeyDescription {
+export type KeyDescriptionData = {
     algorithm: string;
     passphrase: {
         algorithm: string;
@@ -30,9 +30,9 @@ export interface IKeyDescription {
 
 export class KeyDescription {
     private readonly _id: string;
-    private readonly _keyDescription: IKeyDescription;
+    private readonly _keyDescription: KeyDescriptionData;
 
-    constructor(id: string, keyDescription: IKeyDescription) {
+    constructor(id: string, keyDescription: KeyDescriptionData) {
         this._id = id;
         this._keyDescription = keyDescription;
     }
@@ -41,7 +41,7 @@ export class KeyDescription {
         return this._id;
     }
 
-    get passphraseParams(): IKeyDescription["passphrase"] {
+    get passphraseParams(): KeyDescriptionData["passphrase"] {
         return this._keyDescription?.passphrase;
     }
 
diff --git a/src/matrix/ssss/index.ts b/src/matrix/ssss/index.ts
index c82729f2..8c2d126b 100644
--- a/src/matrix/ssss/index.ts
+++ b/src/matrix/ssss/index.ts
@@ -20,7 +20,7 @@ import {keyFromRecoveryKey} from "./recoveryKey";
 import {SESSION_E2EE_KEY_PREFIX} from "../e2ee/common.js";
 import type {Storage} from "../storage/idb/Storage";
 import type {Transaction} from "../storage/idb/Transaction";
-import type {IKeyDescription} from "./common";
+import type {KeyDescriptionData} from "./common";
 import type {Platform} from "../../platform/web/Platform.js";
 import type {Olm} from "./recoveryKey";
 
@@ -44,7 +44,7 @@ async function readDefaultKeyDescription(storage: Storage): Promise<KeyDescripti
     if (!keyAccountData) {
         return;
     }
-    return new KeyDescription(id, keyAccountData.content as IKeyDescription);
+    return new KeyDescription(id, keyAccountData.content as KeyDescriptionData);
 }
 
 export async function writeKey(key: Key, txn: Transaction): Promise<void> {
@@ -58,7 +58,7 @@ export async function readKey(txn: Transaction): Promise<Key | undefined> {
     }
     const keyAccountData = await txn.accountData.get(`m.secret_storage.key.${keyData.id}`);
     if (keyAccountData) {
-        return new Key(new KeyDescription(keyData.id, keyAccountData.content as IKeyDescription), keyData.binaryKey);
+        return new Key(new KeyDescription(keyData.id, keyAccountData.content as KeyDescriptionData), keyData.binaryKey);
     }
 }