diff --git a/benches/bench_log.rs b/benches/bench_log.rs
index 91a4a885..4d7ed731 100755
--- a/benches/bench_log.rs
+++ b/benches/bench_log.rs
@@ -1,4 +1,4 @@
-#![feature(plugin)]
+#![feature(plugin, io)]
 #![allow(non_camel_case_types)]
 
 #[plugin]
diff --git a/serde2/benches/bench_log.rs b/serde2/benches/bench_log.rs
index 33b915f6..42bbefdd 100644
--- a/serde2/benches/bench_log.rs
+++ b/serde2/benches/bench_log.rs
@@ -1,4 +1,4 @@
-#![feature(plugin)]
+#![feature(plugin, io)]
 #![allow(non_camel_case_types)]
 
 #[plugin]
diff --git a/serde2/src/lib.rs b/serde2/src/lib.rs
index 07ff1331..d8cbf30f 100644
--- a/serde2/src/lib.rs
+++ b/serde2/src/lib.rs
@@ -1,3 +1,5 @@
+#![feature(io)]
+
 extern crate unicode;
 
 //pub use ser::{Serialize, Serializer};
diff --git a/src/lib.rs b/src/lib.rs
index 9bda7ee4..c6b6b089 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,4 @@
-#![feature(plugin)]
-#![allow(unstable)]
+#![feature(plugin, io)]
 #![crate_type = "dylib"]
 #![crate_type = "rlib"]