diff --git a/src/libstd/sys/windows/c.rs b/src/libstd/sys/windows/c.rs
index 30aba2f400f2f..6f81afe66f95b 100644
--- a/src/libstd/sys/windows/c.rs
+++ b/src/libstd/sys/windows/c.rs
@@ -296,6 +296,8 @@ pub const PIPE_READMODE_BYTE: DWORD = 0x00000000;
 
 pub const FD_SETSIZE: usize = 64;
 
+pub const STACK_SIZE_PARAM_IS_A_RESERVATION: DWORD = 0x00010000;
+
 #[repr(C)]
 #[cfg(not(target_pointer_width = "64"))]
 pub struct WSADATA {
diff --git a/src/libstd/sys/windows/thread.rs b/src/libstd/sys/windows/thread.rs
index 44ec872b2446b..85588cc6c8e85 100644
--- a/src/libstd/sys/windows/thread.rs
+++ b/src/libstd/sys/windows/thread.rs
@@ -42,7 +42,8 @@ impl Thread {
         let stack_size = (stack + 0xfffe) & (!0xfffe);
         let ret = c::CreateThread(ptr::null_mut(), stack_size,
                                   thread_start, &*p as *const _ as *mut _,
-                                  0, ptr::null_mut());
+                                  c::STACK_SIZE_PARAM_IS_A_RESERVATION,
+                                  ptr::null_mut());
 
         return if ret as usize == 0 {
             Err(io::Error::last_os_error())