diff --git a/app/views/memos/show.html.erb b/app/views/memos/show.html.erb
index 5e2c83790..af02df499 100644
--- a/app/views/memos/show.html.erb
+++ b/app/views/memos/show.html.erb
@@ -45,7 +45,7 @@
 </div>
 <div class="replies">
 	<h3 class="comments"><%= l(:label_reply_plural) %> (<%= @replies.nil? ? 0 : @replies.size %>)</h3>
-	<% pages_count = (params['page'].to_i - 1) * 10 %>
+	<% pages_count = (params['page'].to_i - 1) < 0 ? 0 : ((params['page'].to_i - 1) * 10) %>
 	<% @replies.each do |reply| %>
 	<div class="reply" id="<%= "reply-#{reply.id}" %>">
 	<p class="font_lighter"><%= pages_count += 1 %>楼	:</p>