diff --git a/worker/src/archive/multipart.ts b/worker/src/archive/multipart.ts
index 6af47e0..80ecaec 100644
--- a/worker/src/archive/multipart.ts
+++ b/worker/src/archive/multipart.ts
@@ -10,6 +10,7 @@ export interface TelegramMessage {
   fileId: string;
   fileSize: bigint;
   date: Date;
+  mediaAlbumId?: string;
 }
 
 export interface ArchiveSet {
diff --git a/worker/src/preview/match.ts b/worker/src/preview/match.ts
index 933edcf..0585e0b 100644
--- a/worker/src/preview/match.ts
+++ b/worker/src/preview/match.ts
@@ -10,6 +10,7 @@ export interface TelegramPhoto {
   /** The smallest photo size available — used as thumbnail. */
   fileId: string;
   fileSize: number;
+  mediaAlbumId?: string;
 }
 
 export interface ArchiveRef {