diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index c8e60620248b..0948ebea15df 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -21,6 +21,7 @@
 
 #![feature(crate_visibility_modifier)]
 #![feature(macro_at_most_once_rep)]
+#![cfg_attr(not(stage0), feature(nll))]
 #![feature(rustc_attrs)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(slice_sort_by_cached_key)]