diff --git a/app/controllers/shixuns_controller.rb b/app/controllers/shixuns_controller.rb
index 6b9fc8af0..8b39df933 100644
--- a/app/controllers/shixuns_controller.rb
+++ b/app/controllers/shixuns_controller.rb
@@ -135,7 +135,7 @@ class ShixunsController < ApplicationController
     @path = params[:path]
     @rev = params[:rev]
     file_content = g.files(@shixun.gpid, @path, @rev).content
-    @content = tran_base64_decode64(file_content)
+    @content = tran_base64_decode64(file_content) unless file_content.blank?
 
     respond_to do |format|
       format.js