1diff --git a/crates/algorithm/src/lib.rs b/crates/algorithm/src/lib.rs
2index 853a280..f88acbf 100644
3--- a/crates/algorithm/src/lib.rs
4+++ b/crates/algorithm/src/lib.rs
5@@ -13,6 +13,7 @@
6 // Copyright (c) 2025 TensorChord Inc.
7
8 #![feature(select_unpredictable)]
9+#![feature(let_chains)]
10 #![allow(clippy::type_complexity)]
11
12 mod build;
13diff --git a/src/lib.rs b/src/lib.rs
14index 654b4d1..2b11d03 100644
15--- a/src/lib.rs
16+++ b/src/lib.rs
17@@ -13,6 +13,7 @@
18 // Copyright (c) 2025 TensorChord Inc.
19
20 #![allow(unsafe_code)]
21+#![feature(let_chains)]
22
23 mod datatype;
24 mod index;