diff --git a/ChangeLog b/ChangeLog
index 89b2c823c3..81fec9c919 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Feb 23 14:47:04 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/fileutils.rb (mv): added description for the case of
+	  different partitions.  [ruby-talk:329072]
+
 Mon Feb 23 10:19:41 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* include/ruby/ruby.h (USE_SYMBOL_AS_METHOD_NAME): Module#methods,
diff --git a/lib/fileutils.rb b/lib/fileutils.rb
index 774c0dec8a..32408ee868 100644
--- a/lib/fileutils.rb
+++ b/lib/fileutils.rb
@@ -487,7 +487,7 @@ module FileUtils
   # Options: force noop verbose
   # 
   # Moves file(s) +src+ to +dest+.  If +file+ and +dest+ exist on the different
-  # disk partition, the file is copied instead.
+  # disk partition, the file is copied then the original file is removed.
   # 
   #   FileUtils.mv 'badname.rb', 'goodname.rb'
   #   FileUtils.mv 'stuff.rb', '/notexist/lib/ruby', :force => true  # no error