diff --git a/ChangeLog b/ChangeLog
index bc72ba3670..e4b193a848 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Oct 31 02:35:59 2005  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
+
+	* test/ruby/test_float.rb (test_precision): test by assert_in_delta.
+	  [ruby-dev:27575]
+
 Sat Oct 29 01:58:25 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* ext/etc/etc.c: document update from mathew <meta@pobox.com>.
diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 741093fa61..fb180ff81b 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -40,10 +40,10 @@ class TestFloat < Test::Unit::TestCase
   end
 
   def test_precision
-    #s = "3.7517675036461267e+17"
-    #assert(s == sprintf("%.16e", s.to_f))
-    f = 3.7517675036461267e+17
-    assert_equal(f, sprintf("%.16e", f).to_f)
+    u = 3.7517675036461267e+17
+    v = sprintf("%.16e", u).to_f
+    assert_in_delta(u, v, u.abs * Float::EPSILON)
+    assert_in_delta(u, v, v.abs * Float::EPSILON)
   end
 
   def test_symmetry_bignum # [ruby-bugs-ja:118]