diff --git a/ChangeLog b/ChangeLog
index 98f540c3c6..d0cfaf9484 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jul 23 10:06:19 2008  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* test/zlib/test_zlib.rb (TestZlibDeflate#test_params): suppress a
+	  finalizer warning.
+
 Wed Jul 23 06:25:42 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/syck: suppress warnings more.
diff --git a/test/zlib/test_zlib.rb b/test/zlib/test_zlib.rb
index 5264306bc2..fe8cee5622 100644
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@@ -140,6 +140,7 @@ if defined? Zlib
 
       z = Zlib::Deflate.new
       assert_raise(Zlib::StreamError) { z.params(10000, 10000) }
+      z.close # without this, outputs `zlib(finalizer): the stream was freed prematurely.'
     end
 
     def test_set_dictionary