diff --git a/ChangeLog b/ChangeLog
index 24e68c3509..b96bdfecff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Dec  6 04:33:52 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* lib/pp.rb (File::Stat#pritty_print): some platforms (such as Windows)
+	  does not have major/minor parts of device.
+
 Fri Dec  5 22:43:04 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* ext/psych/lib/psych.rb: bump version to 2.0.8
diff --git a/lib/pp.rb b/lib/pp.rb
index 0091ddf74c..3c73463c9c 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -469,8 +469,10 @@ class File < IO # :nodoc:
         q.comma_breakable
         q.group {
           q.text sprintf("rdev=0x%x", self.rdev)
-          q.breakable
-          q.text sprintf('(%d, %d)', self.rdev_major, self.rdev_minor)
+          if self.rdev_major && self.rdev_minor
+            q.breakable
+            q.text sprintf('(%d, %d)', self.rdev_major, self.rdev_minor)
+          end
         }
         q.comma_breakable
         q.text "size="; q.pp self.size; q.comma_breakable