diff --git a/src/librustc_mir/lib.rs b/src/librustc_mir/lib.rs
index 05c843096d27..42682c34407c 100644
--- a/src/librustc_mir/lib.rs
+++ b/src/librustc_mir/lib.rs
@@ -14,6 +14,7 @@ Rust MIR: a lowered representation of Rust. Also: an experiment!
 
 */
 
+#![cfg_attr(not(stage0), feature(nll))]
 #![feature(infer_outlives_requirements)]
 #![feature(in_band_lifetimes)]
 #![feature(slice_patterns)]