diff --git a/crates/algorithm/src/lib.rs b/crates/algorithm/src/lib.rs
index 853a280..f88acbf 100644
--- a/crates/algorithm/src/lib.rs
+++ b/crates/algorithm/src/lib.rs
@@ -13,6 +13,7 @@
 // Copyright (c) 2025 TensorChord Inc.
 
 #![feature(select_unpredictable)]
+#![feature(let_chains)]
 #![allow(clippy::type_complexity)]
 
 mod build;
diff --git a/src/lib.rs b/src/lib.rs
index 654b4d1..2b11d03 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -13,6 +13,7 @@
 // Copyright (c) 2025 TensorChord Inc.
 
 #![allow(unsafe_code)]
+#![feature(let_chains)]
 
 mod datatype;
 mod index;