diff --git a/src/xargs/mod.rs b/src/xargs/mod.rs
index 0c420a3..cec6252 100644
--- a/src/xargs/mod.rs
+++ b/src/xargs/mod.rs
@@ -306,6 +306,7 @@ impl CommandResult {
     }
 }
 
+#[allow(dead_code)] // `Killed` variant is never constructed on Windows
 #[derive(Debug)]
 enum CommandExecutionError {
     // exit code 255