diff --git a/ChangeLog b/ChangeLog
index c9e71528ef..e24c14f5b5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jan  4 17:28:05 2007  GOTOU Yuuzou  <gotoyuzo@notwork.org>
+
+	* lib/webrick/utils.rb (WEBrick::Utils::TimeoutHandler#initialize):
+	  Arrays could not be modified in its each block. [ruby-dev:30063]
+
 Thu Jan  4 16:57:14 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* yarv_version.h : removed.
diff --git a/lib/webrick/utils.rb b/lib/webrick/utils.rb
index 3b250886db..654abb28b1 100644
--- a/lib/webrick/utils.rb
+++ b/lib/webrick/utils.rb
@@ -124,7 +124,7 @@ module WEBrick
           while true
             now = Time.now
             @timeout_info.each{|thread, ary|
-              ary.each{|info|
+              ary.dup.each{|info|
                 time, exception = *info
                 interrupt(thread, info.object_id, exception) if time < now
               }