diff --git a/library/compiler-builtins/src/lib.rs b/library/compiler-builtins/src/lib.rs
index ed4916f249b1..2263fda00033 100644
--- a/library/compiler-builtins/src/lib.rs
+++ b/library/compiler-builtins/src/lib.rs
@@ -1,4 +1,5 @@
 #![feature(asm)]
+#![feature(core_intrinsics)]
 #![feature(linkage)]
 #![feature(naked_functions)]
 #![cfg_attr(not(test), no_std)]