diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index bce8adaf70fc..5424c0b214a4 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -27,7 +27,6 @@
 
 #![feature(associated_consts)]
 #![feature(bitset)]
-#![feature(copy_lifetime)]
 #![feature(drain)]
 #![feature(filling_drop)]
 #![feature(libc)]