diff --git a/app/controllers/games_controller.rb b/app/controllers/games_controller.rb
index 90906a0c4..6f2f62143 100644
--- a/app/controllers/games_controller.rb
+++ b/app/controllers/games_controller.rb
@@ -18,6 +18,7 @@ class GamesController < ApplicationController
 
   # mushixun的版本库必须创建时就创建
   def show
+    @rev = @rev.nil? ? "master" : @rev
     @git_url = git_repository_url(@myshixun, "Myshixun")
     @entries = @repository.entries(@path, @rev)
     @latest_output = @game.latest_output.try(:out_put)
diff --git a/app/views/games/_tree.html.erb b/app/views/games/_tree.html.erb
index 7dbc00a37..145592b17 100644
--- a/app/views/games/_tree.html.erb
+++ b/app/views/games/_tree.html.erb
@@ -7,7 +7,6 @@
         <% sub_path = entry.path[0] == "/" ? entry.path.sub("/", "") : entry.path %>
         <% ent_path = Redmine::CodesetUtil.replace_invalid_utf8(sub_path)   %>
         <% ent_name = Redmine::CodesetUtil.replace_invalid_utf8(entry.name)   %>
-
         <tr id="<%= tr_id %>" class="<%= h params[:parent_id] %> entry <%= entry.kind %>">
           <td class="filename_no_report hidden">
             <%=  link_to h(ent_name),