diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 1feb6f268fa0f..a69ec76376aab 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -271,7 +271,7 @@
 #![feature(libc)]
 #![feature(link_args)]
 #![feature(linkage)]
-#![feature(min_const_unsafe_fn)]
+#![cfg_attr(not(stage0), feature(min_const_unsafe_fn))]
 #![feature(needs_panic_runtime)]
 #![feature(never_type)]
 #![feature(nll)]