diff --git a/kernel/model/repository.go b/kernel/model/repository.go
index 15ab0524c..7c198da27 100644
--- a/kernel/model/repository.go
+++ b/kernel/model/repository.go
@@ -135,8 +135,8 @@ type LeftRightDiff struct {
 }
 
 type DiffFile struct {
-	FileID string
-	Title  string
+	FileID string `json:"fileID"`
+	Title  string `json:"title"`
 }
 
 func DiffRepoSnapshots(left, right string) (ret *LeftRightDiff, err error) {