diff --git a/src/lib.rs b/src/lib.rs
index ed4916f..2263fda 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 #![feature(asm)]
+#![feature(core_intrinsics)]
 #![feature(linkage)]
 #![feature(naked_functions)]
 #![cfg_attr(not(test), no_std)]