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-rw-r--r--compiler/rustc_middle/src/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/lib.rs b/compiler/rustc_middle/src/lib.rs
index c3e4a03ad16..e47668b9110 100644
--- a/compiler/rustc_middle/src/lib.rs
+++ b/compiler/rustc_middle/src/lib.rs
@@ -48,7 +48,7 @@
 #![feature(trusted_len)]
 #![feature(type_alias_impl_trait)]
 #![feature(strict_provenance)]
-#![feature(associated_type_bounds)]
+#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(rustc_attrs)]
 #![feature(control_flow_enum)]
 #![feature(trait_upcasting)]