diff --git a/ChangeLog b/ChangeLog
index 301e341a89..de67a15173 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Fri Feb 20 01:40:18 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* lib/sync.rb (Sync_m#sync_try_lock): wrong variable name fixed.
+	  a patch from [ruby-core:20561]
+
+	* lib/sync.rb (Sync_m::Err.Fail): turn off Thread.critical before
+	  exit.
+
 Thu Feb 19 17:52:42 2009  Yuki Sonoda (Yugui)  <yugui@yugui.jp>
 
 	* pack.c (pack_pack): fixed odd act of 'm*', 'M*', and 'P*'.
diff --git a/lib/sync.rb b/lib/sync.rb
index 79522ed885..9e522c2466 100644
--- a/lib/sync.rb
+++ b/lib/sync.rb
@@ -54,6 +54,7 @@ module Sync_m
   # exceptions
   class Err < StandardError
     def Err.Fail(*opt)
+      Thread.critical = false
       fail self, sprintf(self::Message, *opt)
     end
     
@@ -129,10 +130,10 @@ module Sync_m
   
   # locking methods.
   def sync_try_lock(mode = EX)
-    return unlock if sync_mode == UN
+    return unlock if mode == UN
     
     Thread.critical = true
-    ret = sync_try_lock_sub(sync_mode)
+    ret = sync_try_lock_sub(mode)
     Thread.critical = false
     ret
   end
diff --git a/version.h b/version.h
index 69fefa0fc2..7acd4b99e0 100644
--- a/version.h
+++ b/version.h
@@ -1,15 +1,15 @@
 #define RUBY_VERSION "1.8.6"
-#define RUBY_RELEASE_DATE "2009-02-19"
+#define RUBY_RELEASE_DATE "2009-02-20"
 #define RUBY_VERSION_CODE 186
-#define RUBY_RELEASE_CODE 20090219
-#define RUBY_PATCHLEVEL 343
+#define RUBY_RELEASE_CODE 20090220
+#define RUBY_PATCHLEVEL 344
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8
 #define RUBY_VERSION_TEENY 6
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 2
-#define RUBY_RELEASE_DAY 19
+#define RUBY_RELEASE_DAY 20
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];