diff --git a/app/logical/post_sets/post.rb b/app/logical/post_sets/post.rb
index 9a7ff0e88..975a96b80 100644
--- a/app/logical/post_sets/post.rb
+++ b/app/logical/post_sets/post.rb
@@ -19,11 +19,11 @@ module PostSets
     end
 
     def has_wiki?
-      tag_array.size == 1 && ::WikiPage.titled(tag_string).exists?
+      is_single_tag? && ::WikiPage.titled(tag_string).exists?
     end
 
     def wiki_page
-      if tag_array.any?
+      if is_single_tag?
         ::WikiPage.titled(tag_string).first
       else
         nil
diff --git a/app/views/posts/index.html.erb b/app/views/posts/index.html.erb
index 784591434..bff9d0e4b 100644
--- a/app/views/posts/index.html.erb
+++ b/app/views/posts/index.html.erb
@@ -48,7 +48,7 @@
 
 <%= content_for(:html_header) do %>
   <link href="<%= posts_path(:format => 'atom', :tags => params[:tags]) %>" rel="alternate" title="ATOM" type="application/atom+xml" />
-  <% if @post_set.wiki_page %>
+  <% if @post_set.has_wiki? %>
     <meta name="description" content="<%= @post_set.wiki_page.presenter.blurb %>"></meta>
   <% end %>
 <% end %>