1 files changed, 4 insertions, 0 deletions
diff --git a/src/libsync/lib.rs b/src/libsync/lib.rs
index de98f79093e..bed90743503 100644
--- a/src/libsync/lib.rs
+++ b/src/libsync/lib.rs
@@ -28,9 +28,13 @@
        html_playground_url = "http://play.rust-lang.org/")]
 
 #![feature(phase, globs, macro_rules, unsafe_destructor)]
+#![feature(import_shadowing)]
 #![deny(missing_doc)]
 #![no_std]
 
+// NOTE(stage0, pcwalton): Remove after snapshot.
+#![allow(unknown_features)]
+
 #[phase(plugin, link)] extern crate core;
 extern crate alloc;
 extern crate collections;