diff --git a/ChangeLog b/ChangeLog
index 52c0c93209..2c02220eb0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Aug 22 19:58:27 2008  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* lib/date.rb: no need to require the "lib/rational.rb" any more.
+
 Fri Aug 22 15:47:38 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* lib/cgi.rb: use bytesize instead of size/length.
diff --git a/lib/date.rb b/lib/date.rb
index d2fc8613b2..5ac8bf03d6 100644
--- a/lib/date.rb
+++ b/lib/date.rb
@@ -193,7 +193,6 @@
 #
 #     puts secs_to_new_year()
 
-require 'rational'
 require 'date/format'
 
 # Class representing a date.