diff --git a/backend/filelu/api/types.go b/backend/filelu/api/types.go
index c92d23d0a..511ad7274 100644
--- a/backend/filelu/api/types.go
+++ b/backend/filelu/api/types.go
@@ -3,6 +3,19 @@ package api
 
 import "encoding/json"
 
+// MultipartInitResponse represents the response from multipart/init.
+type MultipartInitResponse struct {
+	Status int    `json:"status"`
+	Msg    string `json:"msg"`
+	Result struct {
+		UploadID   string `json:"upload_id"`
+		SessID     string `json:"sess_id"`
+		Server     string `json:"server"`
+		FolderID   int64  `json:"folder_id"`
+		ObjectPath string `json:"object_path"`
+	} `json:"result"`
+}
+
 // CreateFolderResponse represents the response for creating a folder.
 type CreateFolderResponse struct {
 	Status int    `json:"status"`