diff --git a/src/io/mod.rs b/src/io/mod.rs
index 367ad5b2d3..a35456e30a 100644
--- a/src/io/mod.rs
+++ b/src/io/mod.rs
@@ -1,10 +1,5 @@
 //! I/O functions
 
-#![feature(asm)]
-#![feature(const_fn)]
-#![feature(core_intrinsics)]
-#![no_std]
-
 pub use self::dma::*;
 pub use self::io::*;
 pub use self::mmio::*;
diff --git a/src/lib.rs b/src/lib.rs
index d394decd85..127c04f477 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,6 @@
 #![feature(asm)]
+#![feature(const_fn)]
+#![feature(core_intrinsics)]
 #![no_std]
 
 pub use self::arch::*;