diff --git a/ChangeLog b/ChangeLog
index 90bdbd8977..434baea11d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Sep 12 19:30:27 2010  Tanaka Akira  <akr@fsij.org>
+
+	* ext/pathname/pathname.c (path_world_writable_p):
+	  Pathname#world_writable? translated from pathname.rb.
+
 Sun Sep 12 09:16:06 2010  Tanaka Akira  <akr@fsij.org>
 
 	* ext/pathname/pathname.c (path_writable_p): Pathname#writable?
diff --git a/ext/pathname/lib/pathname.rb b/ext/pathname/lib/pathname.rb
index ec6fc3fcf3..ce1f2f899d 100644
--- a/ext/pathname/lib/pathname.rb
+++ b/ext/pathname/lib/pathname.rb
@@ -486,9 +486,6 @@ end
 
 class Pathname    # * FileTest *
 
-  # See <tt>FileTest.world_writable?</tt>.
-  def world_writable?() FileTest.world_writable?(@path) end
-
   # See <tt>FileTest.writable_real?</tt>.
   def writable_real?() FileTest.writable_real?(@path) end
 
diff --git a/ext/pathname/pathname.c b/ext/pathname/pathname.c
index 0129a48d04..076aa6a9d9 100644
--- a/ext/pathname/pathname.c
+++ b/ext/pathname/pathname.c
@@ -786,6 +786,15 @@ path_writable_p(VALUE self)
     return rb_funcall(rb_mFileTest, rb_intern("writable?"), 1, get_strpath(self));
 }
 
+/*
+ * See <tt>FileTest.world_writable?</tt>.
+ */
+static VALUE
+path_world_writable_p(VALUE self)
+{
+    return rb_funcall(rb_mFileTest, rb_intern("world_writable?"), 1, get_strpath(self));
+}
+
 /*
  * == Pathname
  *
@@ -1036,4 +1045,5 @@ Init_pathname()
     rb_define_method(rb_cPathname, "sticky?", path_sticky_p, 0);
     rb_define_method(rb_cPathname, "symlink?", path_symlink_p, 0);
     rb_define_method(rb_cPathname, "writable?", path_writable_p, 0);
+    rb_define_method(rb_cPathname, "world_writable?", path_world_writable_p, 0);
 }