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-rw-r--r--library/std_detect/src/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/library/std_detect/src/lib.rs b/library/std_detect/src/lib.rs
index ab1b77bad5b..73e2f5dd964 100644
--- a/library/std_detect/src/lib.rs
+++ b/library/std_detect/src/lib.rs
@@ -15,7 +15,7 @@
 //! * `s390x`: [`is_s390x_feature_detected`]
 
 #![unstable(feature = "stdarch_internal", issue = "none")]
-#![feature(staged_api, doc_cfg, allow_internal_unstable)]
+#![feature(staged_api, cfg_select, doc_cfg, allow_internal_unstable)]
 #![deny(rust_2018_idioms)]
 #![allow(clippy::shadow_reuse)]
 #![cfg_attr(test, allow(unused_imports))]