diff --git a/src/test/compile-fail/regions-assoc-type-outlives-container-hrtb.rs b/src/test/compile-fail/regions-assoc-type-outlives-container-hrtb.rs
index 5e02aae672d35..7d955065ff455 100644
--- a/src/test/compile-fail/regions-assoc-type-outlives-container-hrtb.rs
+++ b/src/test/compile-fail/regions-assoc-type-outlives-container-hrtb.rs
@@ -12,6 +12,7 @@
 // "outlives" requirements. Issue #22246.
 
 #![allow(dead_code)]
+#![feature(rustc_attrs)]
 
 ///////////////////////////////////////////////////////////////////////////