diff --git a/src/io.rs b/src/io.rs
index 8dc80b5..86545bb 100644
--- a/src/io.rs
+++ b/src/io.rs
@@ -1,3 +1,5 @@
+use core::arch::asm;
+
 #[inline(always)]
 pub unsafe fn inb(port: u16) -> u8 {
     let value: u8;
diff --git a/src/lib.rs b/src/lib.rs
index 6c31155..9ab6ed2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,4 @@
 #![no_std]
-#![feature(asm)]
 
 #[macro_use]
 extern crate alloc;