diff --git a/naga/src/front/wgsl/error.rs b/naga/src/front/wgsl/error.rs
index afef7168d6..edd13313e5 100644
--- a/naga/src/front/wgsl/error.rs
+++ b/naga/src/front/wgsl/error.rs
@@ -990,6 +990,7 @@ impl<'a> Error<'a> {
                     )
                     .into(),
                 )],
+                #[allow(irrefutable_let_patterns)]
                 notes: if let EnableExtension::Unimplemented(kind) = kind {
                     vec![format!(
                         concat!(