diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index ae223941778e..d62f6b172580 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -120,7 +120,6 @@
 #![feature(const_slice_len)]
 #![feature(const_str_as_bytes)]
 #![feature(const_str_len)]
-#![cfg_attr(stage0, feature(const_let))]
 #![feature(const_int_rotate)]
 #![feature(const_int_wrapping)]
 #![feature(const_int_sign)]