diff --git a/crates/slice-dst/src/layout_polyfill.rs b/crates/slice-dst/src/layout_polyfill.rs
index 071ac9e..c551599 100644
--- a/crates/slice-dst/src/layout_polyfill.rs
+++ b/crates/slice-dst/src/layout_polyfill.rs
@@ -1,3 +1,5 @@
+#![allow(deprecated)] // this is a polyfill module
+
 use core::{
     alloc::{Layout, LayoutErr},
     cmp,