diff --git a/server/src/main.rs b/server/src/main.rs
index df67f5c..e5bafda 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -22,8 +22,8 @@ struct Handler {
 }
 
 #[tonic::async_trait]
-impl Relay for Handler {
-    type StreamStream =
+impl<E> Relay for Handler {
+    }type StreamStream =
         Pin<Box<dyn Stream<Item = Result<HidReport, Status>> + Send + 'static>>;
 
     async fn stream(