diff --git a/rustls-platform-verifier/src/verification/mod.rs b/rustls-platform-verifier/src/verification/mod.rs
index f607aad..8fedb37 100644
--- a/rustls-platform-verifier/src/verification/mod.rs
+++ b/rustls-platform-verifier/src/verification/mod.rs
@@ -40,6 +40,7 @@ pub use windows::Verifier;
 /// An EKU was invalid for the use case of verifying a server certificate.
 ///
 /// This error is used primarily for tests.
+#[cfg_attr(windows, allow(dead_code))] // not used by windows verifier
 #[derive(Debug, PartialEq)]
 pub(crate) struct EkuError;