diff --git a/src/lib.rs b/src/lib.rs
index 6ca50c0..5452b25 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,6 @@ pub mod mincostflow;
 pub mod modint;
 pub mod scc;
 pub mod segtree;
-#[allow(clippy::many_single_char_names)]
 pub mod string;
 pub mod twosat;
 
diff --git a/src/string.rs b/src/string.rs
index 41cc217..4ea28b8 100644
--- a/src/string.rs
+++ b/src/string.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::many_single_char_names)]
+
 fn sa_naive<T: Ord>(s: &[T]) -> Vec<usize> {
     let n = s.len();
     let mut sa: Vec<usize> = (0..n).collect();