diff --git a/ChangeLog b/ChangeLog
index cb3504f2e6..6ed66c2a86 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jun 20 14:09:54 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* tool/hashbench1.rb: fix paramter too. Increase temporary objects.
+
 Thu Jun 20 14:01:35 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* tool/hashbench1.rb: fix parameters.
diff --git a/tool/hashbench1.rb b/tool/hashbench1.rb
index c67420fcac..cb030d458d 100644
--- a/tool/hashbench1.rb
+++ b/tool/hashbench1.rb
@@ -6,6 +6,6 @@ n = 50_000
   h["%020d" % i] = "v-#{i}"
 }
 
-(n * 500).times{
+(n * 1_000).times{
   ''
 }