diff --git a/src/libstd/sys/windows/ext/mod.rs b/src/libstd/sys/windows/ext/mod.rs
index 7f095ae7ff6..c3578fdfdb1 100644
--- a/src/libstd/sys/windows/ext/mod.rs
+++ b/src/libstd/sys/windows/ext/mod.rs
@@ -21,6 +21,7 @@ pub mod fs;
 pub mod io;
 pub mod raw;
 pub mod process;
+pub mod thread;
 
 /// A prelude for conveniently writing platform-specific code.
 ///
diff --git a/src/libstd/sys/windows/ext/thread.rs b/src/libstd/sys/windows/ext/thread.rs
new file mode 100644
index 00000000000..3a07204b2bc
--- /dev/null
+++ b/src/libstd/sys/windows/ext/thread.rs
@@ -0,0 +1,29 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Extensions to `std::thread` for Windows.
+
+#![unstable(feature = "thread_extensions", issue = "29791")]
+
+use os::windows::io::{RawHandle, AsRawHandle, IntoRawHandle};
+use thread;
+use sys_common::{AsInner, IntoInner};
+
+impl<T> AsRawHandle for thread::JoinHandle<T> {
+    fn as_raw_handle(&self) -> RawHandle {
+        self.as_inner().handle().raw() as *mut _
+    }
+}
+
+impl<T> IntoRawHandle for thread::JoinHandle<T>  {
+    fn into_raw_handle(self) -> RawHandle {
+        self.into_inner().into_handle().into_raw() as *mut _
+    }
+}
diff --git a/src/libstd/sys/windows/thread.rs b/src/libstd/sys/windows/thread.rs
index a6e6cc94b76..1ba85867563 100644
--- a/src/libstd/sys/windows/thread.rs
+++ b/src/libstd/sys/windows/thread.rs
@@ -77,6 +77,10 @@ impl Thread {
             c::Sleep(super::dur2timeout(dur))
         }
     }
+
+    pub fn handle(&self) -> &Handle { &self.handle }
+
+    pub fn into_handle(self) -> Handle { self.handle }
 }
 
 pub mod guard {
diff --git a/src/libstd/thread/mod.rs b/src/libstd/thread/mod.rs
index eaa32cdb342..aef47aa5726 100644
--- a/src/libstd/thread/mod.rs
+++ b/src/libstd/thread/mod.rs
@@ -171,6 +171,7 @@ use sys::thread as imp;
 use sys_common::thread_info;
 use sys_common::unwind;
 use sys_common::util;
+use sys_common::{AsInner, IntoInner};
 use time::Duration;
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -621,6 +622,14 @@ impl<T> JoinHandle<T> {
     }
 }
 
+impl<T> AsInner<imp::Thread> for JoinHandle<T> {
+    fn as_inner(&self) -> &imp::Thread { self.0.native.as_ref().unwrap() }
+}
+
+impl<T> IntoInner<imp::Thread> for JoinHandle<T> {
+    fn into_inner(self) -> imp::Thread { self.0.native.unwrap() }
+}
+
 fn _assert_sync_and_send() {
     fn _assert_both<T: Send + Sync>() {}
     _assert_both::<JoinHandle<()>>();