diff --git a/miri/lib.rs b/miri/lib.rs
index 739ccfbf76..b1c75eb462 100644
--- a/miri/lib.rs
+++ b/miri/lib.rs
@@ -1,7 +1,6 @@
 #![feature(
     i128_type,
     rustc_private,
-    conservative_impl_trait,
     catch_expr,
 )]