diff --git a/ChangeLog b/ChangeLog
index 35d0e7e3de..a7c7b7904b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed May  7 12:06:14 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* benchmark/driver.rb: remove debug output and output results into
+	  specified file.
+
 Wed May  7 11:55:40 2014  Koichi Sasada  <ko1@atdot.net>
 
 	* benchmark/driver.rb: add '--rawdata-output=[FILE] option to output
diff --git a/benchmark/driver.rb b/benchmark/driver.rb
index 1cd44b86dd..3904e25503 100644
--- a/benchmark/driver.rb
+++ b/benchmark/driver.rb
@@ -134,8 +134,7 @@ class BenchmarkDriver
       h[:cpuinfo] = File.read('/proc/cpuinfo') if File.exist?('/proc/cpuinfo')
       h[:executables] = @execs
       h[:results] = @results
-      pp h
-      # @rawdata_output.puts h.inspect
+      @rawdata_output.puts h.inspect
     end
 
     output '-----------------------------------------------------------'