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-rw-r--r--compiler/rustc_errors/src/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index f53ce7ceace..65352f0bc6e 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -5,7 +5,7 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(crate_visibility_modifier)]
 #![feature(backtrace)]
-#![feature(extended_key_value_attributes)]
+#![cfg_attr(bootstrap, feature(extended_key_value_attributes))]
 #![feature(format_args_capture)]
 #![feature(iter_zip)]
 #![feature(nll)]