diff --git a/src/crosvm/sys/unix/device_helpers.rs b/src/crosvm/sys/unix/device_helpers.rs
index 57900a52be..ad16efcae5 100644
--- a/src/crosvm/sys/unix/device_helpers.rs
+++ b/src/crosvm/sys/unix/device_helpers.rs
@@ -439,6 +439,7 @@ pub fn create_virtio_snd_device(
         Backend::NULL => "snd_null_device",
         #[cfg(feature = "audio_cras")]
         Backend::Sys(virtio::snd::sys::StreamSourceBackend::CRAS) => "snd_cras_device",
+        #[cfg(not(feature = "audio_cras"))]
         _ => unreachable!(),
     };