diff --git a/src/test/run-pass/generator/yield-subtype.rs b/src/test/run-pass/generator/yield-subtype.rs
index 5ea4b1fe93c8..7e8a0d1e2b92 100644
--- a/src/test/run-pass/generator/yield-subtype.rs
+++ b/src/test/run-pass/generator/yield-subtype.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions:lexical nll
+#![cfg_attr(nll, feature(nll))]
+
 #![feature(generators)]
 
 fn bar<'a>() {