diff --git a/ChangeLog b/ChangeLog
index 61998df60b..c835eda08b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Dec 24 05:04:56 2013  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* test/fileutils/test_fileutils.rb (setup): should not call
+	  Process.groups for Windows.  get rid of many errors introduced by
+	  r44364.
+
 Mon Dec 23 18:37:16 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* test/fileutils/fileasserts.rb (assert_ownership_group): new
diff --git a/test/fileutils/test_fileutils.rb b/test/fileutils/test_fileutils.rb
index a30d1ab94d..bff9550172 100644
--- a/test/fileutils/test_fileutils.rb
+++ b/test/fileutils/test_fileutils.rb
@@ -112,7 +112,7 @@ class TestFileUtils
 
   def setup
     @prevdir = Dir.pwd
-    @groups = Process.groups
+    @groups = Process.groups if have_file_perm?
     tmproot = TMPROOT
     mymkdir tmproot unless File.directory?(tmproot)
     Dir.chdir tmproot