diff --git a/src/util.rs b/src/util.rs
index 0bac35f..b825660 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -19,6 +19,7 @@ impl UsizeExt for usize {
 
 pub trait IsizeExt {
     fn unwrap_usize(self) -> usize;
+    #[allow(dead_code)]
     fn clamp_into_u16(self) -> u16;
     fn clamp_into_usize(self) -> usize;
 }