diff --git a/ChangeLog b/ChangeLog
index 98cf3c2d44..68e8b13f3e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jan 21 20:09:38 2008  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* lib/date.rb (marshal_load): initialize the cache.
+
 Mon Jan 21 19:42:42 2008  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* transcode.c, enc/trans/utf_16_32.c, test/ruby/test_transcode.rb:
diff --git a/lib/date.rb b/lib/date.rb
index 63d6324eef..63bb9cae15 100644
--- a/lib/date.rb
+++ b/lib/date.rb
@@ -1482,7 +1482,10 @@ class Date
   def marshal_dump() [@ajd, @of, @sg] end
 
   # Load from Marshall format.
-  def marshal_load(a) @ajd, @of, @sg, = a end
+  def marshal_load(a)
+    @ajd, @of, @sg, = a
+    @__ca__ = {}
+  end
 
 end