diff --git a/ChangeLog b/ChangeLog
index 53da484080..c8e150d9d6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue May 20 01:43:44 2008  Koichi Sasada  <ko1@atdot.net>
+
+	* bootstraptest/test_knownbug.rb: fix a test.
+	  "block_given?" returns true if "yield" can be used.
+
 Tue May 20 01:07:19 2008  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* parse.y (assignable_gen): when "self = 1" was evalueted, unnecessary
diff --git a/bootstraptest/test_knownbug.rb b/bootstraptest/test_knownbug.rb
index d5845d149e..9f1bbc8a4d 100644
--- a/bootstraptest/test_knownbug.rb
+++ b/bootstraptest/test_knownbug.rb
@@ -7,9 +7,9 @@ assert_equal 'ok', %q{
   class C
     define_method(:foo) {
       if block_given?
-        :ok
-      else
         :ng
+      else
+        :ok
       end
     }
   end