diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index 5bd59b23f..e95c7fcd0 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -74,8 +74,8 @@ func (fs *FilerServer) listDirectoryHandler(w http.ResponseWriter, r *http.Reque
 		lastFileName,
 		shouldDisplayLoadMore,
 	}
-	
-	if strings.ToLower(r.Header.Get("Content-Type")) == "application/json" {
+
+	if r.Header.Get("Accept") == "application/json" {
 		writeJsonQuiet(w, r, http.StatusOK, args)
 	} else {
 		ui.StatusTpl.Execute(w, args)