diff --git a/doc/dev/logs/2012-01-18.url b/doc/dev/logs/2012-01-18.urls
similarity index 57%
rename from doc/dev/logs/2012-01-18.url
rename to doc/dev/logs/2012-01-18.urls
index f17f6815..5120faa1 100644
--- a/doc/dev/logs/2012-01-18.url
+++ b/doc/dev/logs/2012-01-18.urls
@@ -1 +1,2 @@
 http://haarts.tumblr.com/post/16015091140/cdist-the-setup
+http://d.hatena.ne.jp/kinneko/20120111/p26