diff --git a/ChangeLog b/ChangeLog
index ef336563fb..ba3c2ca367 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Sep  3 06:16:07 2010  Tanaka Akira  <akr@fsij.org>
+
+	* ext/pathname/pathname.c (path_pipe_p): Pathname#pipe?
+	  translated from pathname.rb.
+
 Fri Sep  3 06:14:40 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/pty/pty.c (chfunc): restore errno from SystemCallError and
diff --git a/ext/pathname/lib/pathname.rb b/ext/pathname/lib/pathname.rb
index 7391c7bce3..aa46a91c49 100644
--- a/ext/pathname/lib/pathname.rb
+++ b/ext/pathname/lib/pathname.rb
@@ -486,9 +486,6 @@ end
 
 class Pathname    # * FileTest *
 
-  # See <tt>FileTest.pipe?</tt>.
-  def pipe?() FileTest.pipe?(@path) end
-
   # See <tt>FileTest.socket?</tt>.
   def socket?() FileTest.socket?(@path) end
 
diff --git a/ext/pathname/pathname.c b/ext/pathname/pathname.c
index 3cd1764440..6a24b84b47 100644
--- a/ext/pathname/pathname.c
+++ b/ext/pathname/pathname.c
@@ -669,6 +669,15 @@ path_file_p(VALUE self)
     return rb_funcall(rb_mFileTest, rb_intern("file?"), 1, get_strpath(self));
 }
 
+/*
+ * See <tt>FileTest.pipe?</tt>.
+ */
+static VALUE
+path_pipe_p(VALUE self)
+{
+    return rb_funcall(rb_mFileTest, rb_intern("pipe?"), 1, get_strpath(self));
+}
+
 /*
  * == Pathname
  *
@@ -906,4 +915,5 @@ Init_pathname()
     rb_define_method(rb_cPathname, "grpowned?", path_grpowned_p, 0);
     rb_define_method(rb_cPathname, "directory?", path_directory_p, 0);
     rb_define_method(rb_cPathname, "file?", path_file_p, 0);
+    rb_define_method(rb_cPathname, "pipe?", path_pipe_p, 0);
 }