diff --git a/kernel/bootstrap/stat.rb b/kernel/bootstrap/stat.rb
index 61cf3d8..b3a51c2 100644
--- a/kernel/bootstrap/stat.rb
+++ b/kernel/bootstrap/stat.rb
@@ -87,6 +87,11 @@ module Rubinius
       raise PrimitiveFailure, "Rubinius::Stat#ctime primitive failed"
     end

+    def birthtime
+      Rubinius.primitive :stat_birthtime
+      raise NotImplementedError, "birthtime() function is unimplemented on this machine"
+    end
+
     def inspect
       "#<#{self.class.name} dev=0x#{self.dev.to_s(16)}, ino=#{self.ino}, " \
       "mode=#{sprintf("%07d", self.mode.to_s(8).to_i)}, nlink=#{self.nlink}, " \
diff --git a/kernel/common/file.rb b/kernel/common/file.rb
index fca8498..465a505 100644
--- a/kernel/common/file.rb
+++ b/kernel/common/file.rb
@@ -104,6 +104,28 @@ class File < IO
   end

   ##
+  # Returns the change time for the named file (the
+  # time at which directory information about the
+  # file was changed, not the file itself).
+  #
+  #  File.ctime("testfile")   #=> Wed Apr 09 08:53:13 CDT 2003
+  def self.ctime(path)
+    Stat.new(path).ctime
+  end
+
+  def self.birthtime(path)
+    Stat.new(path).birthtime
+  end
+
+  ##
+  # Returns the modification time for the named file as a Time object.
+  #
+  #  File.mtime("testfile")   #=> Tue Apr 08 12:58:04 CDT 2003
+  def self.mtime(path)
+    Stat.new(path).mtime
+  end
+
+  ##
   # Returns the last component of the filename given
   # in file_name, which must be formed using forward
   # slashes (``/’’) regardless of the separator used
@@ -305,16 +327,6 @@ class File < IO
   end

   ##
-  # Returns the change time for the named file (the
-  # time at which directory information about the
-  # file was changed, not the file itself).
-  #
-  #  File.ctime("testfile")   #=> Wed Apr 09 08:53:13 CDT 2003
-  def self.ctime(path)
-    Stat.new(path).ctime
-  end
-
-  ##
   # Returns true if the named file is a directory, false otherwise.
   #
   # File.directory?(".")
@@ -816,14 +828,6 @@ class File < IO
     Stat.lstat path
   end

-  ##
-  # Returns the modification time for the named file as a Time object.
-  #
-  #  File.mtime("testfile")   #=> Tue Apr 08 12:58:04 CDT 2003
-  def self.mtime(path)
-    Stat.new(path).mtime
-  end
-
   def self.path(obj)
     return obj.to_path if obj.respond_to? :to_path

@@ -1226,6 +1230,18 @@ class File < IO
     Stat.new(@path).atime
   end

+  def ctime
+    Stat.new(@path).ctime
+  end
+
+  def birthtime
+    Stat.new(@path).birthtime
+  end
+
+  def mtime
+    Stat.new(@path).mtime
+  end
+
   def reopen(other, mode = 'r+')
     rewind unless closed?
     unless other.kind_of? IO
@@ -1234,10 +1250,6 @@ class File < IO
     super(other, mode)
   end

-  def ctime
-    Stat.new(@path).ctime
-  end
-
   def flock(const)
     const = Rubinius::Type.coerce_to const, Integer, :to_int

@@ -1251,10 +1263,6 @@ class File < IO
     Stat.lstat @path
   end

-  def mtime
-    Stat.new(@path).mtime
-  end
-
   def stat
     Stat.fstat @descriptor
   end
diff --git a/vm/builtin/stat.cpp b/vm/builtin/stat.cpp
index 2bff56b..8c9ecd5 100644
--- a/vm/builtin/stat.cpp
+++ b/vm/builtin/stat.cpp
@@ -77,5 +77,9 @@ namespace rubinius {
     return Time::at(state, st_.st_ctime);
   }

+  Time* Stat::stat_birthtime(STATE) {
+    return Time::at(state, st_.st_birthtime);
+  }
+
 }

diff --git a/vm/builtin/stat.hpp b/vm/builtin/stat.hpp
index dd17723..e7735b1 100644
--- a/vm/builtin/stat.hpp
+++ b/vm/builtin/stat.hpp
@@ -73,6 +73,9 @@ namespace rubinius {
     // Rubinius.primitive+ :stat_ctime
     Time* stat_ctime(STATE);

+    // Rubinius.primitive+ :stat_birthtime
+    Time* stat_birthtime(STATE);
+
     class Info : public TypeInfo {
     public:
       BASIC_TYPEINFO(TypeInfo)