diff --git a/ChangeLog b/ChangeLog
index 8f19057652..c051e7feb4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Feb 20 19:11:20 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/ostruct.rb (OpenStruct#initialize_copy): should not share
+	  members.  [ruby-dev:22966]
+
 Fri Feb 20 18:59:47 2004  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* lib/irb/init.rb (IRB::IRB.parse_opts): add -I option to
diff --git a/lib/ostruct.rb b/lib/ostruct.rb
index 786bd4de20..b0bb775263 100644
--- a/lib/ostruct.rb
+++ b/lib/ostruct.rb
@@ -52,6 +52,12 @@ class OpenStruct
     end
   end
 
+  # Duplicate an OpenStruct object members. 
+  def initialize_copy(orig)
+    super
+    @table = @table.dup
+  end
+
   def method_missing(mid, *args) # :nodoc:
     mname = mid.id2name
     len = args.length