diff --git a/ChangeLog b/ChangeLog
index 1caabab8fa..8a94a92408 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Mar  4 21:21:51 2009  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* lib/thread.rb (SizedQueue#push): fix limit condition.
+	  [ruby-dev:38135]
+
 Wed Mar  4 20:27:10 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in (mingw): checks if unicows.lib is available.
diff --git a/lib/thread.rb b/lib/thread.rb
index 68eeaf5b05..e5585c30bd 100644
--- a/lib/thread.rb
+++ b/lib/thread.rb
@@ -292,7 +292,7 @@ class SizedQueue < Queue
     t = nil
     @mutex.synchronize{
       while true
-        break if @que.length <= @max
+        break if @que.length < @max
         @queue_wait.push Thread.current
         @mutex.sleep
       end