diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/server/storages/index.ts b/packages/plugins/@nocobase/plugin-file-manager/src/server/storages/index.ts
index f0224f1359c..d40e03712ba 100644
--- a/packages/plugins/@nocobase/plugin-file-manager/src/server/storages/index.ts
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/server/storages/index.ts
@@ -34,7 +34,6 @@ export interface AttachmentModel {
   path: string;
   url?: string;
   storageId: number;
-  mimetype: string;
 }
 
 export abstract class StorageType {