diff --git a/src/lib.rs b/src/lib.rs
index bdfd3d7..be27a31 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,7 +4,7 @@
 #![unstable]
 #![warn(missing_docs)]
 
-#![feature(associated_types, slicing_syntax, old_orphan_check)]
+#![feature(associated_types, slicing_syntax)]
 #[cfg(feature = "ctcp")] extern crate time;
 #[cfg(feature = "encode")] extern crate encoding;
 extern crate "rustc-serialize" as rustc_serialize;