diff --git a/src/@types/crypto.ts b/src/@types/crypto.ts
index a8836d52cb..fa8dd228e8 100644
--- a/src/@types/crypto.ts
+++ b/src/@types/crypto.ts
@@ -16,11 +16,6 @@ limitations under the License.
 
 import type { ISignatures } from "./signed.ts";
 
-export type OlmGroupSessionExtraData = {
-    untrusted?: boolean;
-    sharedHistory?: boolean;
-};
-
 // Backwards compatible re-export
 export type { EventDecryptionResult as IEventDecryptionResult } from "../common-crypto/CryptoBackend.ts";
 
diff --git a/src/rust-crypto/backup.ts b/src/rust-crypto/backup.ts
index d4bda400cc..342055163a 100644
--- a/src/rust-crypto/backup.ts
+++ b/src/rust-crypto/backup.ts
@@ -118,7 +118,7 @@ export class RustBackupManager extends TypedEventEmitter<RustBackupCryptoEvents,
     /**
      * Determine if a key backup can be trusted.
      *
-     * @param info - key backup info.
+     * @param info - key backup info dict from {@link CryptoApi.getKeyBackupInfo}.
      */
     public async isKeyBackupTrusted(info: KeyBackupInfo): Promise<BackupTrustInfo> {
         const signatureVerification: SignatureVerification = await this.olmMachine.verifyBackup(info);