diff --git a/starlark/src/lib.rs b/starlark/src/lib.rs
index 06da0d43a..3e1a8e4ac 100644
--- a/starlark/src/lib.rs
+++ b/starlark/src/lib.rs
@@ -393,6 +393,7 @@
 // Features we use
 #![allow(stable_features)]
 #![allow(unknown_lints)] // for clippy::tuple_array_conversions
+#![cfg_attr(rust_nightly, allow(internal_features))]
 #![cfg_attr(rust_nightly, feature(const_type_id))]
 #![cfg_attr(rust_nightly, feature(core_intrinsics))]
 #![cfg_attr(rust_nightly, feature(cfg_sanitize))]
diff --git a/starlark_map/src/lib.rs b/starlark_map/src/lib.rs
index abf6a3933..f4df252ee 100644
--- a/starlark_map/src/lib.rs
+++ b/starlark_map/src/lib.rs
@@ -25,6 +25,7 @@
 #![cfg_attr(rust_nightly, feature(core_intrinsics))]
 #![cfg_attr(rust_nightly, feature(portable_simd))]
 #![cfg_attr(rust_nightly, feature(cfg_version))]
+#![cfg_attr(rust_nightly, allow(internal_features))]
 
 mod hash_value;
 mod hashed;