diff --git a/app/models/post.rb b/app/models/post.rb
index 6472b4cf6..af9bc3364 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -478,6 +478,9 @@ class Post < ActiveRecord::Base
     def apply_metatags(tags)
       tags.each do |tag|
         case tag
+        when /^parent:none$/, /^parent:0$/
+          self.parent_id = nil
+          
         when /^parent:(\d+)$/
           self.parent_id = $1.to_i