diff --git a/ChangeLog b/ChangeLog
index ca3c867c61..c4563b6119 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,9 @@
-Mon Feb  2 00:28:54 2004  Tanaka Akira  <akr@m17n.org>
+Mon Feb  2 01:54:00 2004  Tanaka Akira  <akr@m17n.org>
+
+	* lib/pp.rb (Struct#pretty_print): make it 1.8 style.
+	  (Numeric#pretty_print, FalseClass#pretty_print)
+	  (TrueClass#pretty_print, Module#pretty_print): fix pp for objects
+	  with instance variables.  [ruby-talk:91157]
 
 	* lib/open-uri.rb (URI::Generic#find_proxy): return nil on loopback
 	  address.
@@ -22,7 +27,7 @@ Sun Feb  1 05:30:06 2004  Tanaka Akira  <akr@m17n.org>
 
 	* lib/open-uri.rb (URI::Generic#find_proxy): warn HTTP_PROXY.
 	 raise an errror on non-http proxy URI.
-	 (OpenURI::Buffer#<<): make a tempfile binmode.
+	 (OpenURI::Buffer#<<): make a tempfile binmode.  [ruby-talk:90792]
 
 Sun Feb  1 00:57:41 2004  Kouhei Sutou  <kou@cozmixng.org>
 
diff --git a/lib/pp.rb b/lib/pp.rb
index c366e25932..a9491f62d2 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -309,7 +309,7 @@ end
 
 class Struct
   def pretty_print(q)
-    q.object_group(self) {
+    q.group(1, '#<struct ' + self.class.name, '>') {
       self.members.each {|member|
         q.text "," unless q.first?
         q.breakable
@@ -440,6 +440,14 @@ end
   }
 }
 
+[Numeric, FalseClass, TrueClass, Module].each {|c|
+  c.class_eval {
+    def pretty_print(q)
+      q.text inspect
+    end
+  }
+}
+
 if __FILE__ == $0
   require 'test/unit'
 
@@ -534,6 +542,10 @@ if __FILE__ == $0
       result = PP.pp(a, '')
       assert_equal("#{a.inspect}\n", result)
       assert_match(/\A#<Object.*>\n\z/m, result)
+      a = 1
+      a.instance_eval { @a = nil }
+      result = PP.pp(a, '')
+      assert_equal("#{a.inspect}\n", result)
     end
     
     def test_to_s_without_iv
@@ -562,7 +574,7 @@ if __FILE__ == $0
     def test_struct
       a = S.new(1,2)
       a.b = a
-      assert_equal("#<Struct::S a=1, b=#<Struct::S:...>>\n", PP.pp(a, ''))
+      assert_equal("#<struct Struct::S a=1, b=#<Struct::S:...>>\n", PP.pp(a, ''))
     end
 
     def test_object