diff --git a/ChangeLog b/ChangeLog
index de77382765..7642603ea2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon May 18 21:40:11 2009  Tanaka Akira  <akr@fsij.org>
+
+	* lib/pathname.rb (Pathname#sub): suppress a warning.  [ruby-dev:38488]
+
 Sun May 17 23:23:14 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/mkmf.rb (SRC_EXT): should be flat.
diff --git a/lib/pathname.rb b/lib/pathname.rb
index 7b7ed374ea..8af8957c7b 100644
--- a/lib/pathname.rb
+++ b/lib/pathname.rb
@@ -270,7 +270,7 @@ class Pathname
         ensure
           Thread.current[:pathname_sub_matchdata] = old
         end
-        yield *args
+        yield(*args)
       }
     else
       path = @path.sub(pattern, *rest)