diff --git a/std/src/lib.rs b/std/src/lib.rs
index 5b94f036248cb..53d5db02ecf68 100644
--- a/std/src/lib.rs
+++ b/std/src/lib.rs
@@ -391,6 +391,11 @@
 #![feature(stdarch_internal)]
 // tidy-alphabetical-end
 //
+// Library features (crates without staged_api):
+// tidy-alphabetical-start
+#![feature(rustc_private)]
+// tidy-alphabetical-end
+//
 // Only for re-exporting:
 // tidy-alphabetical-start
 #![feature(assert_matches)]