diff --git a/lib/model/model.go b/lib/model/model.go
index deef90c3a..9e898395d 100644
--- a/lib/model/model.go
+++ b/lib/model/model.go
@@ -2732,11 +2732,11 @@ func (m *model) Revert(folder string) {
 }
 
 type TreeEntry struct {
-	Name     string                `json:"name"`
-	ModTime  time.Time             `json:"modTime"`
-	Size     int64                 `json:"size"`
-	Type     protocol.FileInfoType `json:"type"`
-	Children []*TreeEntry          `json:"children,omitempty"`
+	Name     string       `json:"name"`
+	ModTime  time.Time    `json:"modTime"`
+	Size     int64        `json:"size"`
+	Type     string       `json:"type"`
+	Children []*TreeEntry `json:"children,omitempty"`
 }
 
 func findByName(slice []*TreeEntry, name string) *TreeEntry {
@@ -2804,7 +2804,7 @@ func (m *model) GlobalDirectoryTree(folder, prefix string, levels int, dirsOnly
 
 		parent.Children = append(parent.Children, &TreeEntry{
 			Name:    base,
-			Type:    f.Type,
+			Type:    f.Type.String(),
 			ModTime: f.ModTime(),
 			Size:    f.FileSize(),
 		})
diff --git a/lib/model/model_test.go b/lib/model/model_test.go
index 4935bf163..1c79f0e1e 100644
--- a/lib/model/model_test.go
+++ b/lib/model/model_test.go
@@ -1729,7 +1729,7 @@ func TestGlobalDirectoryTree(t *testing.T) {
 			Name:    name,
 			ModTime: time.Unix(0x666, 0),
 			Size:    0xa,
-			Type:    protocol.FileInfoTypeFile,
+			Type:    protocol.FileInfoTypeFile.String(),
 		}
 	}
 	d := func(name string, entries ...*TreeEntry) *TreeEntry {
@@ -1737,7 +1737,7 @@ func TestGlobalDirectoryTree(t *testing.T) {
 			Name:     name,
 			ModTime:  time.Unix(0x666, 0),
 			Size:     128,
-			Type:     protocol.FileInfoTypeDirectory,
+			Type:     protocol.FileInfoTypeDirectory.String(),
 			Children: entries,
 		}
 	}