diff --git a/wgpu-hal/src/metal/surface.rs b/wgpu-hal/src/metal/surface.rs
index bac3bc6871..be10bf7bb6 100644
--- a/wgpu-hal/src/metal/surface.rs
+++ b/wgpu-hal/src/metal/surface.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::let_unit_value)] // `let () =` being used to constrain result type
+
 use std::{mem, os::raw::c_void, ptr::NonNull, sync::Once, thread};
 
 use core_graphics_types::{