diff --git a/ChangeLog b/ChangeLog
index ff36a15df8..a940522549 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Tue Aug 14 19:19:10 2012  Benoit Daloze  <eregontp@gmail.com>
+
+	update PP with recent Kernel#inspect change. Patch by Yusuke Endoh.
+
+	* lib/pp.rb (class PP): do not call #to_s anymore, as #inspect no more does.
+	* test/test_pp.rb (class PPInspectTest): remove related assertion.
+	  [ruby-core:43238][Feature #6130]
+
 Tue Aug 14 19:09:38 2012  Benoit Daloze  <eregontp@gmail.com>
 
 	Kernel#inspect: improve consistency and do not call #to_s.
diff --git a/lib/pp.rb b/lib/pp.rb
index 94269abe65..6e0c797d2e 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -265,8 +265,7 @@ class PP < PrettyPrint
   module ObjectMixin
     # 1. specific pretty_print
     # 2. specific inspect
-    # 3. specific to_s
-    # 4. generic pretty_print
+    # 3. generic pretty_print
 
     # A default pretty printing method for general objects.
     # It calls #pretty_print_instance_variables to list instance variables.
@@ -283,18 +282,10 @@ class PP < PrettyPrint
         inspect_method = method_method.call(:inspect)
       rescue NameError
       end
-      begin
-        to_s_method = method_method.call(:to_s)
-      rescue NameError
-      end
       if inspect_method && /\(Kernel\)#/ !~ inspect_method.inspect
         q.text self.inspect
       elsif !inspect_method && self.respond_to?(:inspect)
         q.text self.inspect
-      elsif to_s_method && /\(Kernel\)#/ !~ to_s_method.inspect
-        q.text self.to_s
-      elsif !to_s_method && self.respond_to?(:to_s)
-        q.text self.to_s
       else
         q.pp_object(self)
       end
diff --git a/test/test_pp.rb b/test/test_pp.rb
index fe65287d88..acd3e835b9 100644
--- a/test/test_pp.rb
+++ b/test/test_pp.rb
@@ -118,7 +118,6 @@ class PPInspectTest < Test::Unit::TestCase
     def a.to_s() "aaa" end
     result = PP.pp(a, '')
     assert_equal("#{a.inspect}\n", result)
-    assert_equal("aaa\n", result)
   end
 end