diff --git a/app/models/post.rb b/app/models/post.rb
index d5dc75bdd..430bbc3b4 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -291,7 +291,7 @@ class Post < ActiveRecord::Base
     end
 
     def normalized_source
-      if source =~ /pixiv\.net\/img/
+      if source =~ /pixiv\.net\/img(?:\d+\/img)?\//
         img_id = source[/(\d+)(_s|_m|(_big)?_p\d+)?\.[\w\?]+\s*$/, 1]
 
         "http://www.pixiv.net/member_illust.php?mode=medium&illust_id=#{img_id}"