diff --git a/src/libstd/io/timer.rs b/src/libstd/io/timer.rs
index 844a97dea2d50..68ae7d0ff2083 100644
--- a/src/libstd/io/timer.rs
+++ b/src/libstd/io/timer.rs
@@ -227,6 +227,12 @@ mod test {
     use thread::Thread;
     use time::Duration;
 
+    #[test]
+    fn test_timer_send() {
+        let mut timer = Timer::new().unwrap();
+        Thread::spawn(move || timer.sleep(Duration::milliseconds(1)));
+    }
+
     #[test]
     fn test_io_timer_sleep_simple() {
         let mut timer = Timer::new().unwrap();
diff --git a/src/libstd/sys/windows/timer.rs b/src/libstd/sys/windows/timer.rs
index 1ae3979cd9acc..12b4e56bf5209 100644
--- a/src/libstd/sys/windows/timer.rs
+++ b/src/libstd/sys/windows/timer.rs
@@ -48,9 +48,9 @@ pub enum Req {
     RemoveTimer(libc::HANDLE, Sender<()>),
 }
 
+unsafe impl Send for Timer {}
 unsafe impl Send for Req {}
 
-
 fn helper(input: libc::HANDLE, messages: Receiver<Req>, _: ()) {
     let mut objs = vec![input];
     let mut chans = vec![];