diff --git a/backend/services/snapshot-service/src/api/dto/snapshot.response.ts b/backend/services/snapshot-service/src/api/dto/snapshot.response.ts
index 21bd2ac6..a0587c85 100644
--- a/backend/services/snapshot-service/src/api/dto/snapshot.response.ts
+++ b/backend/services/snapshot-service/src/api/dto/snapshot.response.ts
@@ -5,6 +5,7 @@ export class SnapshotDetailResponse {
   @ApiProperty() target: string;
   @ApiProperty() status: string;
   @ApiProperty() progress: number;
+  @ApiProperty({ required: false }) progressMsg: string | null;
   @ApiProperty() fileSize: string;
   @ApiProperty() fileName: string | null;
   @ApiProperty() error: string | null;
@@ -52,6 +53,7 @@ export function toSnapshotResponse(task: any): SnapshotTaskResponse {
       target: d.target,
       status: d.status,
       progress: d.progress,
+      progressMsg: d.progressMsg ?? null,
       fileSize: d.fileSize.toString(),
       fileName: d.fileName,
       error: d.error,