diff --git a/ChangeLog b/ChangeLog
index 1f10db7d10..90bdbd8977 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Sep 12 09:16:06 2010  Tanaka Akira  <akr@fsij.org>
+
+	* ext/pathname/pathname.c (path_writable_p): Pathname#writable?
+	  translated from pathname.rb.
+
 Sun Sep 12 08:36:15 2010  Tanaka Akira  <akr@fsij.org>
 
 	* process.c (rlimit_resource_name2int): support more limits:
diff --git a/ext/pathname/lib/pathname.rb b/ext/pathname/lib/pathname.rb
index 985451e8ae..ec6fc3fcf3 100644
--- a/ext/pathname/lib/pathname.rb
+++ b/ext/pathname/lib/pathname.rb
@@ -486,9 +486,6 @@ end
 
 class Pathname    # * FileTest *
 
-  # See <tt>FileTest.writable?</tt>.
-  def writable?() FileTest.writable?(@path) end
-
   # See <tt>FileTest.world_writable?</tt>.
   def world_writable?() FileTest.world_writable?(@path) end
 
diff --git a/ext/pathname/pathname.c b/ext/pathname/pathname.c
index 14b745c164..0129a48d04 100644
--- a/ext/pathname/pathname.c
+++ b/ext/pathname/pathname.c
@@ -777,6 +777,15 @@ path_symlink_p(VALUE self)
     return rb_funcall(rb_mFileTest, rb_intern("symlink?"), 1, get_strpath(self));
 }
 
+/*
+ * See <tt>FileTest.writable?</tt>.
+ */
+static VALUE
+path_writable_p(VALUE self)
+{
+    return rb_funcall(rb_mFileTest, rb_intern("writable?"), 1, get_strpath(self));
+}
+
 /*
  * == Pathname
  *
@@ -1026,4 +1035,5 @@ Init_pathname()
     rb_define_method(rb_cPathname, "size?", path_size_p, 0);
     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);
 }