diff --git a/ChangeLog b/ChangeLog
index a60dfec052..d5aa2a2a47 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Aug 21 10:40:06 2012  Koichi Sasada  <ko1@atdot.net>
+
+	* test_continuation.rb (tracing_with_thread_set_trace_func): 
+	  fix to use Thread#set_trace_func(nil), not set_trace_func(nil).
+
 Tue Aug 21 09:32:41 2012  Ryan Davis  <ryand-ruby@zenspider.com>
 
 	* lib/minitest/*: Imported minitest 3.3.0 (r7676)
diff --git a/test/ruby/test_continuation.rb b/test/ruby/test_continuation.rb
index 18289c5418..52d8de482c 100644
--- a/test/ruby/test_continuation.rb
+++ b/test/ruby/test_continuation.rb
@@ -120,7 +120,7 @@ class TestContinuation < Test::Unit::TestCase
     if cont
       Thread.current.set_trace_func(func)
     else
-      set_trace_func(nil)
+      Thread.current.set_trace_func(nil)
     end
   end