diff --git a/src/librustc_incremental/lib.rs b/src/librustc_incremental/lib.rs
index 73886e5e281..22b260642e4 100644
--- a/src/librustc_incremental/lib.rs
+++ b/src/librustc_incremental/lib.rs
@@ -14,6 +14,7 @@
       html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
       html_root_url = "https://doc.rust-lang.org/nightly/")]
 
+#![cfg_attr(not(stage0), feature(nll))]
 #![feature(specialization)]
 
 #![recursion_limit="256"]