diff --git a/ChangeLog b/ChangeLog
index 4411581cf2..fb67f342ef 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Dec 25 14:03:48 2007  NARUSE, Yui <naruse@ruby-lang.org>
+
+	* test/rinda/test_rinda.rb (MockClock#{_forward, forwrd, sleep}):
+	  Change default value of n as @reso from nil.  If default value is
+	  nil, n.+ is not defined.
+
 Tue Dec 25 13:54:01 2007  Tanaka Akira  <akr@fsij.org>
 
 	* test/ruby/test_io_m17n.rb (test_pipe): fixed.
diff --git a/test/rinda/test_rinda.rb b/test/rinda/test_rinda.rb
index ba08e26d78..d796546a3d 100644
--- a/test/rinda/test_rinda.rb
+++ b/test/rinda/test_rinda.rb
@@ -33,14 +33,14 @@ class MockClock
     n
   end
     
-  def _forward(n=nil)
+  def _forward(n=@reso)
     now ,= @ts.take([nil, :now])
     @now = now + n
     n = @reso if n.nil?
     @ts.write([@now, :now])
   end
 
-  def forward(n=nil)
+  def forward(n=@reso)
     while n > 0
       _forward(@reso)
       n -= @reso
@@ -55,7 +55,7 @@ class MockClock
     @ts.write([2, :now])
   end
 
-  def sleep(n=nil)
+  def sleep(n=@reso)
     while will_deadlock? 
       n -= @reso
       forward