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-rw-r--r--compiler/rustc_hir/src/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_hir/src/lib.rs b/compiler/rustc_hir/src/lib.rs
index 93224d388c0..f1d62d03cbc 100644
--- a/compiler/rustc_hir/src/lib.rs
+++ b/compiler/rustc_hir/src/lib.rs
@@ -2,9 +2,9 @@
 //!
 //! [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/hir.html
 
+#![feature(associated_type_defaults)]
 #![feature(const_btree_new)]
 #![feature(crate_visibility_modifier)]
-#![feature(in_band_lifetimes)]
 #![feature(once_cell)]
 #![feature(min_specialization)]
 #![feature(never_type)]