diff --git a/src/lib/fs.rs b/src/lib/fs.rs
index 0d9a0242207..915dbd9cd3b 100644
--- a/src/lib/fs.rs
+++ b/src/lib/fs.rs
@@ -127,9 +127,8 @@ fn make_dir(p: path, mode: int) -> bool {
     #[cfg(target_os = "win32")]
     fn mkdir(_p: path, _mode: int) -> bool {
         // FIXME: turn mode into something useful?
-        let noctx = ptr::null();
         ret str::as_buf(_p, {|buf|
-            os::kernel32::CreateDirectory(buf, noctx)
+            os::kernel32::CreateDirectory(buf, ptr::null())
         });
     }